TY  - BOOK
AU  - Wiersma,G.B.
TI  - Environmental monitoring and assessment: an international journal 
AV  - TD169 .E617 1995
U1  - 363.7 
PY  - 1995///
CY  - Netherland
PB  - Kluwer Academic
KW  - Environment
KW  - Wiersma
KW  - G
ER  -