Soil organic matter : its nature, its role in soil formation and in soil fertility / by M. M. Kononova,T. Z. Nowakowski and A. C. D. Newman. Kononova, M. M. Nowakowski,T. Z. Newman,A. C. D. Fertilizers and manures. 631.417 KOS Bibliography: ( p. 441-505). and index. Oxford : Pergamon Press ; 1966 . 1966 . 1966 Text 544 p. : eng