@BOOK {LAL:1979n,
title = {Soil erosion problems on an alfisol in western Nigeria and their control: IITA monograph No. 1},
author = {Lal, R. },
series = {IITA monograph No. 1},
year = {1979},
publisher = {International Institute of Tropical Agriculture (IITA)},
address = {Ibadan, Nigeria},
note = {208p.},
}