(3MGdI GdGZPjI hGdRQGYI s - FAO (3efXeI GdCZPjI hGdRQGYI s ((3GjWGdjG (B: s (3efXeI GdCZPjI hGdRQGYI (B, s, 1982)
Keywords: (3GdJfejI GdGbJUGOjI s; (3hGQOGJ GdHdOGf GdfGejIs