Graff, Otto.
Progress In Soil Biology Beitrage Zur Bodenbiologie Travaux Recents de la Biologie du Sol / Textual Documents Otto, Graff and John, E.Satchell. - Amsterdam : North-Holland Publishing Company , 1967. - x,668p ; .
Farming Soil Biology
631.407406 / PSB
Progress In Soil Biology Beitrage Zur Bodenbiologie Travaux Recents de la Biologie du Sol / Textual Documents Otto, Graff and John, E.Satchell. - Amsterdam : North-Holland Publishing Company , 1967. - x,668p ; .
Farming Soil Biology
631.407406 / PSB