(3eQGMd Gdfeh GdGbJUGOjs - (3h(B. (3h(B, (3QhSJhs; (3HQgGf GdOLGfi (B( (3JQLeI (B)s; "(3SYjO GdZQjH GdfLGQ(B"s ((3HjQhJs (3efThQGJ GdecJHI GdGgdjIs, 1960)
Keywords: (3SjGSI hGbJUGOs