The geology of the San Juan district, Porto Rico
By: by Douglas R. Semmes ...
Publisher: New York Academy of Sciences
Published: 1919
Place of publication: New York
Language: eng
Number of pages: 110
Subjects: Geology -- Puerto Rico
Notes: Bibliography: p. 108-110.
Thesis (Ph. D.)--Columbia University, 1917.
Cover-title.
Vita.
"Contributions from the Department of Geology, Columbia University, vol. XXVIII, no. 3."
"Scientific Survey of Porto Rico and the Virgin Islands, vol. I, part 1."