(3SJI ef YdeGA GdWHjYI(B: (3chQj(B- (3LGdjdjh(B- (3fjhJf(B- (3OGaj(B- (3aQGOGj(B- (3cdafs - (3Lhf hGdJfs; (3Cejf eMehO GdTQjas; (3eMeO QaYJs ((3eUQs (3ecJHI fgVI eUQ s, 1958)
Keywords: Natural Sciences (3GdYdhe GdHMJIs; General