(3bUI GdQGOjh (B/ s - (3ZhOGd, a(B.(3Ls; (3LhjLGJj, SYO Gddgs ((3HjQhJ (B:s (3ecJHI dHfGf,s, 1974)
Keywords: (3GdQGOjhs; (3fGTGhf UZGQ (B(10-14)(3Sfgs