TY  - BOOK
AU  - Keith, Lawrence H.
TI  - Principles of Environmental Sampling 
SN  - 0841211736
U1  - 628.50287 
PY  - 1987///
CY  - Washington, Dc : 
PB  - American Chemical Society, 
KW  - Environmental Chemistry
KW  - Environmental Monitoring
KW  - Pollution Measurement
N1  - NN
UR  - https://eaklibrary.neduet.edu.pk:8443/catalog/bk/books/toc/0-841-21173-6.pdf
ER  -