. (3GdeLehYI GdcGedI deGQhf YHhOs - . (3YHhO, eGQhfs; ((3YHhO, fXjQ (B((3GYOGOs ((3HjQhJs (3OGQ eGQhf YHhOs, 1983)
(3L(B. 12 (3agQSs
Keywords: (3GdGOH GddHfGfjs -- (3eLehYGJs