TY  - BOOK
TI  - The rural land classification program of Puerto Rico
T2  - Northwestern University Studies in Geography; no.1
AV  - IRA HD110.5.P9N6 
PY  - 1952///
CY  -  :Evancton
PB  - Northwestern University
KW  - Rural land
KW  -  Land use
KW  - Puerto Rico
ER  -