TY  - BOOK
AU  - UNITED NATIONS, INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (Departments of--)
ED  - UNITED NATIONS, INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (Departments of--)
TI  - COncepts of methods of invironment statistics of natural environment:  A technical report.   
U1  - X:(G):55.N91t, N1/UN 
PY  - 1991///
CY  - New York
PB  - United Nations        
N1  - Studies in methods series F, no. 57
ER  -