TY  - BOOK
ED  - United States
TI  - The Ecological life zones of Puerto Rico and the U.S. Virgin Islands
T2  - Forest Service research paper ITF
PY  - 1973///
CY  - [Washington]
KW  - Ecology
KW  - Puerto Rico
KW  - Virgin Islands of the United States
N1  - Bibliographical references included in "Literature cited." (p. 66-71)
ER  -