Analysis of productivity levels and economic efficiency in agriculture / S.K.V. Suryanarayana Raju. Suryanarayana Raju, S. K. V. Agricultural productivity India Vishākhapatnam District. HD2075.V58 S87 1986 338.16 19 RAA Includes index and bibliographical references Study conducted in Vishakhapatnam District, Andhra Pradesh. India : Chug, 1987. 1987. 1986 Text viii, 368 p. : eng India Vishākhapatnam District.