Simpson, E. S., & Sharp, J. M. (1990). Selected papers on hydrogeology: From the 28th International Geological Congress, Washington, D.C., U.S.A., July 9-19, 1989. Hannover, West Germany: Verlag H. Heise.
Παραπομπή Chicago StyleSimpson, Eugene S., and John Malcolm Sharp. Selected Papers On Hydrogeology: From the 28th International Geological Congress, Washington, D.C., U.S.A., July 9-19, 1989. Hannover, West Germany: Verlag H. Heise, 1990.
Παραπομπή MLASimpson, Eugene S., and John Malcolm Sharp. Selected Papers On Hydrogeology: From the 28th International Geological Congress, Washington, D.C., U.S.A., July 9-19, 1989. Hannover, West Germany: Verlag H. Heise, 1990.
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