TY  - BOOK
AU  - Symposium on population pressures upon physical & social resources in the developing lands, Pennsylvania State Univ., Sept. 17-23, 1967
AU  - Zelinsky, Wilbur ; ed.
AU  - Kosinski, Leszek A. ; jt. ed.
AU  - Prothero, R. Mansell ; jt. ed.
TI  - Geography and crowding World; proceedings
U1  - 309.13046 
PY  - 1970///
CY  - New York
PB  - Oxford University Press
ER  -