00549nam a2200181Ia 4500082002500000100003200025245005900057260004400116300001400160500000500174690000500179700002900184856000700213952010600220964001700326921000900343999001500352  a309.2509542bD229.FE  aDas, R. B. and Singh, D. P.  aFormulation and execution of block plans; a case study  aCalcuttabOxford University Pressc1968  axv, 154p.  a  a  aSingh, D. P. ; jt. auth.  df  00104070aISIbISId1998-06-04l0o309.2509542 D229.FEpDP7261r2019-02-14 00:00:00w2019-02-14yBK  abcdefg  a1440  c1440d1440