TY  - BOOK
TI  - Trav.conf.scient.NU pr.conservation & util.des ressourc.natur.,17/08-6/09/1949,Lake Success,NW York
PY  - 1950///
PB  - NW York,NU,Dép.Questions Econom.,I.Séances plénières,LXVII+451pp.
ER  -