TY  - BOOK
ED  -  United Nations Environment Programme.
TI  -  International Referral System for Sources of Environmental Informati on : : operations manual
U1  -  PF 333.7 UNI 
PY  - 1975///
CY  -  [s.l.] : 
PB  -  [s.n.], 
KW  -  Environment Information
KW  -  Handbooks, manuals, etc
ER  -