O'Sullivan, R. B. (1975). Coughs Creek Tongue--a new tongue of the Eocene Green River Formation, Piceance Creek basin, Colorado.
Chicago Style (17th ed.) CitationO'Sullivan, Robert Brett. Coughs Creek Tongue--a New Tongue of the Eocene Green River Formation, Piceance Creek Basin, Colorado. 1975.
MLA (9th ed.) CitationO'Sullivan, Robert Brett. Coughs Creek Tongue--a New Tongue of the Eocene Green River Formation, Piceance Creek Basin, Colorado. 1975.
Warning: These citations may not always be 100% accurate.