TY  - BOOK
AU  - Watts,Simon
AU  - Halliwell,Lyndsay
TI  - Essential environmental science: methods & techniques 
SN  - 0415132460 (cloth)
U1  - 333.7  23
PY  - 1996///
CY  - New York
PB  - Routledge
KW  - Environmental sciences
N1  - Includes bibliographical references and index
ER  -