DIN 38410-2:1990-10

German standard methods for the examination of water, waste water and sludge; biological-ecological analysis of water (group M); determination of the saprobic index (M 2)

German standard methods for the examination of water, waste water and sludge; biological-ecological examination of waters (group M); procedure for the determination of the saprobic index on the basis of benthic communities (M 2); classification literature