Paramēśvaran, Eṃ. Pi., 1935- Sthānīyaṅṅaḷuṃ tējōdgiraṇavuṃ. Isotopes and radioactivity. - 1962. - 44, iii p. diagrs. 18 cm. In Malayalam. LCCN: sa 64007028 Subjects--Topical Terms: Radioisotopes. LC Class. No.: QC795 / .P34