TY  - BOOK
AU  - Alexanderson Gunnar
AU  -  Kleverbring Bjorn-Ivar
TI  - World resources :  Energy, metal minerals   Studies  
U1  - U671.1.N7, L8 
PY  - 1978///
CY  - Berlin
PB  - Walter de Gruyter        
KW  - Geography
N1  - Bib p. 227-28
ER  -