AS 1871.7-1976

Adoption, with amendment, of Sections 121, pp 168-170, 121B pp 174-176 SPADNS method, and 208, page 407 of "Standard Methods for the Examination of Water and Wastewater" - 13th Edition 1971, prepared and published jointly by - American Public Health Association; american Water Works Association; & Water Pollution Control Federation (USA).