TY  - BOOK
AU  - Western,David
AU  - Pearl,Mary C.
TI  - Conservation for the twenty-first century
SN  - 0-19-505474-1
AV  - QH75 C65
PY  - 1989///
CY  - New York, E.U.A.
PB  - Oxford University
N1  - Bibliografia : p. 325-353
ER  -