APA (7th ed.) Citation

Kosanke, R. M. (1947). Plant microfossils in correlation of coal beds. [publisher not identified].

Chicago Style (17th ed.) Citation

Kosanke, Robert M. Plant Microfossils in Correlation of Coal Beds. Urbana: [publisher not identified], 1947.

MLA (9th ed.) Citation

Kosanke, Robert M. Plant Microfossils in Correlation of Coal Beds. [publisher not identified], 1947.