TY  - BOOK
AU  - Watts,Simon
AU  - Halliwell,Lyndsay
TI  - Essential environmental science : : methods & techniques 
SN  - 0415132479 (pbk.)
PY  - 1996///
CY  - New York
PB  - Routledge
KW  - Environmental sciences
KW  - Experiments
KW  - Methodology
KW  - Technique
N1  - Includes index; Includes bibliographical references
ER  -