Beck, B. F., Wilson, W. L., Feldman, L., & Beck, B. F. (1987). Karst hydrogeology: Engineering and environmental applications : proceedings of the Second Multidisciplinary Conference on Sinkholes and the Environmental Impacts of Karst, Orlando/Florida/9-11 February 1987. Rotterdam Boston: A.A. Balkema.
Παραπομπή Chicago StyleBeck, Barry F., William L. Wilson, Laura Feldman, and Barry F. Beck. Karst Hydrogeology: Engineering and Environmental Applications : Proceedings of the Second Multidisciplinary Conference On Sinkholes and the Environmental Impacts of Karst, Orlando/Florida/9-11 February 1987. Rotterdam Boston: A.A. Balkema, 1987.
Παραπομπή MLABeck, Barry F., William L. Wilson, Laura Feldman, and Barry F. Beck. Karst Hydrogeology: Engineering and Environmental Applications : Proceedings of the Second Multidisciplinary Conference On Sinkholes and the Environmental Impacts of Karst, Orlando/Florida/9-11 February 1987. Rotterdam Boston: A.A. Balkema, 1987.