00297nam a2200109Ia 450000500170000000800410001708200120005810000220007024500430009226000440013530000080017920260225051045.0260224s9999||||xx |||||||||||||| ||und||  a630 LUM  aThomson A.Lumpkin 0aUse and management in crop production   aColorado: Westview Tropical Pressc1982  a230