TY  - BOOK
AU  - Weitzel, R L
AU  - ASTM
TI  - Methods and Measurements of Periphyton Communities: a review
PY  - 1979///
CY  - USA
PB  - ASTM
KW  - Freshwater algae--Measurement
KW  - Freshwater microbiology--Methodology
KW  - Algal communities
KW  - Water quality biological assessment--Methodology
UR  - http://books.google.com.pk/books/about/Methods_and_Measurements_of_Periphyton_C.html?id=eEVRAAAAMAAJ&redir_esc=y
ER  -