00308nam a2200097Ia 4500008004100000082001900041100001600060245008400076260004000160300001000200190415s9999    xx            000 0 und d  a338.0954 MEH-;  aMehta, S.S. 0aProductivity, production function and technical change: a survey of some Indian  aNew DelhibConcept Publishingc1980  a182p.