TY - BOOK AU - Biggs,B.J. AU - Gifford,J.S. AU - Smith,D.G. ED - New Zealand. ED - New Zealand. ED - National Water and Soil Conservation Organisation (N.Z.) TI - Biological methods for water quality surveys T2 - Water & soil miscellaneous publication, U1 - 628.161 22 PY - 1983/// CY - Wellington, N.Z. PB - Water & Soil Division, Ministry of Works and Development for the National Water & Soil Conservation Organisation KW - Water quality KW - Measurement KW - Methodology KW - Aquatic biology N1 - Includes bibliographical references ER -