Namboodiripad M., . (1948). Sciencientte Vikasam. : Mangalodayam ; Thrissur.
Namboodiripad M.C, . 1948. Sciencientte Vikasam. : Mangalodayam ; Thrissur.
Namboodiripad M.C, . Sciencientte Vikasam. : Mangalodayam ; Thrissur. 1948.