(3GdGgejI GdSJQGJjLjI hGdfXGe GdbGfhfj ddWQjb GdedGMj GdHMQj aj GdNdjL GdYQHj (B/ s - (3MSjf, MSjf fOG, s ((3HZOGO, GdYQGb (B: s (3efThQGJ hRGQI GdKbGaI hGdGYdGe, (B400 (3g`(B. = 1980.s, 1980)
(3jJVef GQLGYGJ HHdjhLQGajI (B: (3UaMI (B151-156.s
Keywords: (3GdbGfhf GdOhdj GdHMQjs -- (3Ohd GdNdjL GdYQHjI(B.s; (3GdedGMIs -- (3Ohd GdNdjL GdYQHjI(B.s; (3GdbGfhf GdHMQjs -- (3Ohd GdNdjL GdYQHjI(B.s