1. Standard Methods For The Examination of Water and Wastewater;APHA,1980
2. Engineering assessment of vermicomposting municipal wastewater sludges;Camp, Dresser & McKee, Inc.;EPA 600/2-81-075,1981
3. Accumulation of heavy metals in the earthworm Eisenia foetida;Hartenstein;J. envir. Qual.,1980
4. The reproductive potential of the earthworm Eisenia foetida;Hartenstein;Oecologia,1979
5. Composition of the earthworm Eisenia foetida (Savigny) and assimilation of 15 elements from sludge during growth;Hartenstein;Comp. Biochem. Physiol.,1980