TY  - BOOK
AU  - Hettena,P.H.G.
AU  - Syer,G.N.
ED  - Conservation Society
TI  - Decade od decision: : report on The Conservation Society's
PY  - 1971///
CY  - London
PB  - The Conservation Society
KW  - Problema social
KW  - Sociología
ER  -