(3GdbVjI (B: s (3eSQMjI ebJHSg Yf cGfcG (B/ s - (3LjO, CfOQjgs; (3dhjS, LGfs ((3HjQhJ (B:s (3GdeDSSg GdYQHjg ddOQGSGJ hGdfTQ,s, 1981)
Keywords: (3GdeSQMjGJ GdaQfSjIs; (3GdCOH GdaQfSjs