Yearbook India 10 General Book 8 Science 6 1972 4 1993 3 Applied physics 3 Directory 3 Energy engineering 3 Manorama 3 1971 2 1975 2 1977 2 1982 2 1987 2 1989 2 1992 2 1999 2 2000 2 Biography 2 Countries 2 Dictionary 2 Generalia Reference Source 2 Manorama yearbook 2 Reference Book 2 1973 1 1974 1 1978 1 1979 1 1981 1