TY - BOOK AU - Schwab,Cleen Orville AU - Fevert,Richard K. TI - Soil and water conservation engineering / U1 - 631.4 SOI PY - 1981/// CY - New York : PB - Wiley, KW - Soil conservation KW - Africa KW - Water conservation KW - agricultural engineering N1 - Previous 2 editions published in 1955 and 1966 entered under R. K. F evert ER -