(3GdYOhGf GdUdjHi Ydi eUQ (B:s (3gRjeI dhjS GdJGSY ai GdefUhQI haGQSchQ (B/s - (3LhRja fSje jhSas ((3GdGScfOQjI (B: s (3OGQ GdeYQaI GdLGeYjI , s, 1969)
Keywords: (3GdJGQjN GdGSdGeis; (3GdMQhH GdUdjHjI ai eUQs; (3GdOhdI GdGjhHjIs