TY  - BOOK
AU  - Watts,Simon
AU  - Halliwell,Lyndsay
TI  - Essential environmental science: methods & techniques 
SN  - 0415132460
AV  - GE70.E87  
PY  - 1996///
CY  - London, New York
PB  - Routledge
KW  - Environmental sciences
KW  - Experiments
KW  - Methodology
KW  - Technique
UR  - http://www.loc.gov/catdir/enhancements/fy0649/96015719-d.html
ER  -