TY  - BOOK
AU  - Nebel
AU  - Wright
TI  - Environmental Science : The Way the World Works 
SN  - 0-13-352154-0
PY  - 1996///
CY  - Saddle River
PB  - Prentice Hall
KW  - Mediu ambiant
KW  - Ştiinţe naturale
KW  - 504=111
N2  - Bibliographical references p. 650-666
ER  -