Fettke, Charles R. <br/><br/>
The geology of the Humacao district, Porto Rico 
Charles R. Fettke. 
 - New York  New York Academy of Sciences  1924. 
 - p. 117-197  ill., 1 col. map (folded)  25 cm. 
 - Scientific survey of Porto Rico and the Virgin Islands / New York Academy of Sciences  v. 2, pt. 2 .
 - New York Academy of Sciences.  Scientific survey of Porto Rico and the Virgin Islands  v. 2, pt. 2. .
<br/><br/>Bibliography: p. 197. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Puerto Rico--Humacao.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Puerto Rico