TY - BOOK AU - Schwab,Glenn O. AU - Frevert,Richard K. TI - Elementary soil and water engineering SN - 0471825875 (pbk.) U1 - 631.41̈9 PY - 1985/// CY - New York PB - Wiley KW - Soil conservation KW - Hydraulic engineering KW - Water conservation N1 - Recommended text : *AG413 (Agriculture) ER -