TY  - BOOK
ED  -  International symposium on the ecological bases for environmental ma nagement 
ED  -  International Biological Programme.
TI  -  International Biological  Programme and International Union of Biolo gical Sciences
PY  - 1970///
CY  -  s.l : 
PB  -  s.n., 
KW  -  Environmental policy
ER  -