TY  - BOOK
TI  - Environmental conservation
SN  - 0471196002 (cloth)
AV  - S938 .D37 1972
PY  - 1972///.
CY  - New York, London [etc.]
PB  - J. Wiley
KW  - âEcologie humaine
KW  - âEtats-Unis
KW  - Conservation des ressources naturelles
KW  - Environnement
KW  - environnement - protection
KW  - rero
ER  -