Uthaman P., . (1984). J C Bose,S Ramanujan,C V Raman. Kottayam: Kairali children's book trust.
Uthaman Pk, . 1984. J C Bose,S Ramanujan,C V Raman. Kottayam: Kairali children's book trust.
Uthaman Pk, . J C Bose,S Ramanujan,C V Raman. Kottayam: Kairali children's book trust. 1984.
