(3YeQ EHf CHj QHjYI (B/ s - (3LHhQ, LHQGFjds ((3HjQhJ (B:s (3OGQ GdYde ddedGjjf,s, 1979)
(3GdeMJhjGJ (B1. (3L(B1- (3YUQg (B2. (3L(B2- (3MjGJg (B3. (3L(B3- (3MHg h TYQgs
Keywords: (3GdTYQGA GdYQHs