Abstract
(1979). -. Journal of Environmental Studies, 9(9), -.
. "-", Journal of Environmental Studies, 9, 9, 1979, -.
(1979). '-', Journal of Environmental Studies, 9(9), pp. -.
, "-," Journal of Environmental Studies, 9 9 (1979): -,
-. Journal of Environmental Studies, 1979; 9(9): -.
)