The geology of the Coamo-Guayama District, Porto Rico
Edwin T. Hodge.
- New York New York Academy of Sciences 1920.
- p. 111-228 ill., 1 col. map (folded) 25 cm.
- Scientific survey of Porto Rico and the Virgin Islands / New York Academy of Sciences v. 1, pt. 2 .
- New York Academy of Sciences. Scientific survey of Porto Rico and the Virgin Islands v. 1, pt. 2. .