00693nam a2200169Ia 4500082001200000100002800012245010800040260003000148300002100178650004600199650005500245650005500300650005500355650005700410650003800467710001800505  aTR.0325  aRao, Manikya Mudhamalle 0aNatural language versus controlled vocabulary in information retrieval : A case study in soil mechanics  c1993bUniversity of Poona  a310p. + C D - 50  aCONTROLLED VOCABULARIES//SUBJECT HEADINGS  aSOIL MECHANICS///SUBJECT HEADINGS - SOIL MECHANICS  aSOIL MECHANICS///SUBJECT HEADINGS - SOIL MECHANICS  aSOIL MECHANICS///SUBJECT HEADINGS - SOIL MECHANICS  aTHESAURI (CONTROLLED VOCABULARIES)//SUBJECT HEADINGS  aSUBJECT HEADINGS - SOIL MECHANICS  aMahajan, S.G.