00294nam a2200109Ia 450000500170000000800410001708200140005810000190007224500370009126000480012830000080017620260224040933.0260224s9999||||xx |||||||||||||| ||und||  a631.4 ZEL  aZelenin, A.N.  0aMachines for moving the earth :   aNew Delhi: Published for the US Agri.c1985  a555