TY  - BOOK
AU  - Brown,Lester Russell
ED  - Worldwatch Institute.
TI  - State of the world 1990: a Worldwatch Institute report on progress toward a sustainable society 
SN  - 0393306143
PY  - 1990///
CY  - New York
PB  - W. W. Norton and Company , 
KW  - Economic development
KW  - Environmental aspects
KW  - Sustainable development
KW  - Conservation of natural resources
N1  - Includes bibliographical references and index
ER  -