00440nam a22001457a 4500 OSt 260601b |||||||| |||| 00| 0 eng d 631.4 T30S S.K. Thakur Studies on Influence of Permanent and Intermittent Water-Logging on the Nature of Clay Minerals Developed on Some Important Soils of Bihar RPCAU 1983 141 MSc. Soil Science ddc T 51111 51111