TY  - BOOK
AU  - Brown,Lester R.
TI  - State of the World 1987: a Worldwatch Institute Report on Progress Toward a Sustainable Society
SN  - 0393303896
PY  - 1987///
CY  - New York (etc.) : 
PB  - W.W.Norton, 
KW  - CONSERVACION DE LOS RECURSOS
N1  - Includes notes bibliofiques
ER  -