Free M. T. I., . (1957). Vigyan ka adbhut sansar (HIN). Delhi: Rajkamal Prakashan.
Free Mae Tatha Ira, . 1957. Vigyan ka adbhut sansar (HIN). Delhi: Rajkamal Prakashan.
Free Mae Tatha Ira, . Vigyan ka adbhut sansar (HIN). Delhi: Rajkamal Prakashan. 1957.