Clemons, R. E. (1966). Geology of the Chiquimula Quadrangle, Guatemala, Central America. [publisher not identified].
Chicago Style (17th ed.) CitationClemons, Russell Edward. Geology of the Chiquimula Quadrangle, Guatemala, Central America. Austin, Tex.: [publisher not identified], 1966.
MLA (9th ed.) CitationClemons, Russell Edward. Geology of the Chiquimula Quadrangle, Guatemala, Central America. [publisher not identified], 1966.
Warning: These citations may not always be 100% accurate.