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1 — BERGQUIST, S. G. (1939) : The occurrence of spore coal in the Williamston Basin. Michi., Jour., Sed. Petrology, 9 : pp. 14-19.

2 — BALME, B. E. & BUTTERWORTH, M. (1951) : Observation on the distribution of certain Microspores in the Central group of English Coalfield. C. R. III, Carb. Cong., Heerlen, T. I, p. 13.

3 — BALME, B. E. (1952) : The principal Microspores of the Permian Coal of Collie. B. No. 105.

4 — BHARDWAJ, C. D. & KREMP, G. (1955) : Die Sporen führung der Velener Schichten des Ruhrkarbons. Geol. Jb , Band 71, pp. 51 -61, 1 Taf., 5 Tab., Hannover.

5 — BHARDWAJ, C. D. (1957) : The Spore flora of Velener Schichten (Lower Westphalian D) in the Ruhrcoal measures. Palaeontographica Abt. B, B. 102, Liefg. 4-6, pp. 110-138, Stuttgart.

6 — CHANDLER, M. E. J. (1946) : Note on some abnormally large spores formerly atributed to Isoetes. Ann. and Mag. Nat. Hist. London, Ser. 11, Vol. 13, pp. 684-690.

7 — CROSS, A. T. (1947) : Spore floras of the Pennsylvanian of Wat Virginia and Kentucky. Journ. Geol., 55, No. 3, pp. 285-308, 5 Pls. Chicago.

8 — CROOKAL, D. SC. & MORRIS, L. S.O. (1952) : The Carboniferous Microspores have been designated Cl by varius Authors. Bull, of the Geological Survey of G. Britain, No. 4, pp. 49-78.

9 — DIJKSTRA, S. J. (1951) : Some practical applications of Coal Petrography. C. R. III, Congris dt Strat. et de Geol. du Carbonifere-Heerlen.

10 (1958) : On a Megaspore-bearing Lycopod strobilus. Acta Botanica, Neerlandiea, 7, pp. 217-222. 11 — ERGOLSKAYA, Z. V. (1936) : Spores of the Barzas Coals, Kuznetsk-Basin. Trans. Centr. Prosp. Inst. U. S. S. R. 70, pp. 1 63. 12 — GUENNEL. G. K. (1952) : Fossil Spores of the Alleghenian Coal in Indiana. Indiana Department of Conseivation Geol. Surv. Rept. of Progress No. 4. 13 — HORST, U. (1955) : Die Sporae dispersae des Namurs von Westoberschlesien und MahrichOstrau. Palaeont., Vol. LXCII, pp. 138-236. 14 — KENDALL, M. (1942) : Jurassic Lycopod Meagaspores from Gristhorpe Plant Bed. Ann. and Mag. Nat. Hist. Ser. 11, Vol. IX, pp. 920-924. 15 — KOSANKE, R. M. (1930) : Pennsylvanian Spores of Illinois and their use in Correlation. III. Geol. Surv, Bull., 74, Illinois. 16 — KREMP, G. (1950) : Stratigraphische Untersuchungen im Ruhr - Karbon mit Hilfe von Mikrofossilien (Mega-und Mikrosporen, Ostracoderi, Foraminireren u. a) - (im Vortragsreferat Heine : Die Augenschiefer -Grabgange und die Mikrofossilien . . .) Glückauf, 86, pp. 733-736, Essen. 17 (1951) : Sporen-Vergesellschaftungen und Mikrofaunen Horizonte im Ruhr-Karbon. C. R. Ill, Carb. Congr. Heerlen, T. I, pp. 347-358. 18 — KNOX, E. M. (1951) : The Microspores of some Scottisch Coals and their vertical distribution. C. R. III, Carb. Congr. Heerlen T. I, pp. 333-335. 19 — LUBER, A. A. & WALTZ, I.E. (1938) : Classification and stratigrafic value of some Carboniferous Coal deposits in the U. S. S. R. Trans. Centr. Geol. Prosp. Inst. Fasc. CV, pp. 1-46. 20 — LUBER, E. L. (1938) : Spores and Pollen from Coals of the Permian of U. S. S. R. Problem of Soviet Geol. Fasc. VIII, pp. 152-160. 21 — OKAY, A. C. (1944) : Microscopische qualitatif-petrographische Untersuchung der Kohle aus dem Flöz der Kozlu Stufe von Zonguldak. M. T. A. Nr. 1/31. p. 137. 22 — PAGET, R.F. (1936 a) : The Correlation of Coal seams by Microspore analysis, the seams of Warwickshire. Colliery Guardian, Vol. CLIII, No. 3954, pp. 659-663. 23 — POTONIE, R, THOMSON, P. W & THIERGART, F. (1950) : Zur Nomenklatur und Klassification der Neogenen Sporomorphae (Pollen und Sporen). Geol. Jahrbuch, Band 65, pp. 35-69. 24 — POTONIE, R. & KREMP, G. (1956) : Die Sporae dispersae des Ruhr-karbons. Teil III, Paleont. Abt. B, 100, Liefg. 4-6, 6521, Stuttgart. 25 — RAISTRICK, A. (1937) : The Microspores of Coal and their use in Correlation etc. C. R. II, Congr. Strat. Carb. Heerlen, T. II, p. 909. 26 — ROUSSEAU, A. (1938) : Etude de quelques types de Spores du Westphalien C. Bull. Mus. Roy. Hist. Nat. Belg. T. XIV, No. 33, pp. 1-6. 27 — SHIMAKURA, M. (1940) : Vegetable remains in the Paleozoic Coals from the Lower Yangtze Region, China. Journ. Shanghai. Inst. Sci; Sect. II, Vol. III, pp. 23-48.

28 — SCHEMEL, M. P. (1950) : Carboniferous Plant Spores from Daggett County, Utah. Journal of Paleontology, Vol. 24, No. 2, pp. 232-244.

29 — THOMSON, P. W. (1952) : Beitrag zur Kenntnis der Sporomorphenflora im Unter und Mittel Devon. Palaeont. Z., 25, 3/4, 155-159, Stuttgart.

30 — WILSON, L. S. (1946) : The Correlation of sedimentary rocks by fossils spores and Pollen. Journ. Sed. Petrology, Vol. 16, No. 3, pp. 110-120, 3 Figs.

31 — YAHŞIMAN, K. & GÖKTUNALI, K. (1954) : Akseki Bölgesinde yapılmış olan linyit ve taşkömürü tetkikatı hakkında rapor. M. T. A. Arch. Rap. No. 2469 (in Turkish)