International and Interdisciplinary Symposium Columbo, Sri Lanka, & Erdelen, W. (1991). Ecology and landscape management in Sri Lanka: Proceedings of the International and Interdisciplinary Symposium, Colombo, Sri Lanka, 12-26 March 1990. Verlag Josef Margraf.
Cita Chicago (17th ed.)International and Interdisciplinary Symposium Columbo, Sri Lanka, i W. Erdelen. Ecology and Landscape Management in Sri Lanka: Proceedings of the International and Interdisciplinary Symposium, Colombo, Sri Lanka, 12-26 March 1990. Weikersheim, [Germany]: Verlag Josef Margraf, 1991.
Cita MLA (8th ed.)International and Interdisciplinary Symposium Columbo, Sri Lanka, i W. Erdelen. Ecology and Landscape Management in Sri Lanka: Proceedings of the International and Interdisciplinary Symposium, Colombo, Sri Lanka, 12-26 March 1990. Verlag Josef Margraf, 1991.