APA (7th ed.) Citation

Lapo, A. V., & Malán, O. (1981). Petrologic study of some brown coals of Chukotka and comparison with the coals of the North Bohemian Brown Coal Basin.

Chicago Style (17th ed.) Citation

Lapo, Andrei V., and Oldřich Malán. Petrologic Study of Some Brown Coals of Chukotka and Comparison with the Coals of the North Bohemian Brown Coal Basin. Plzeň, 1981.

MLA (9th ed.) Citation

Lapo, Andrei V., and Oldřich Malán. Petrologic Study of Some Brown Coals of Chukotka and Comparison with the Coals of the North Bohemian Brown Coal Basin. 1981.