1. Le niveau de glaciation comme fonction de I'accumulation d'humidité sous forme solide.;Ahlmann;Géograph. Ann.,1924
2. Quaternary stratigraphy in the Davis Mountains, Trans-Pecos, Texas.;Albritton;Bull. Geol. Soc. Am.,1939
3. A Pleistocene molluscan fauna near Byers, Clay County, Texas.;Allen;J. Graduata, Res. Center,1961
4. Water under the Sahara.;Ambroggi;Sci. Am.,1966
5. Water-loss investigations: Lake Hefner studies, Technical report.;Anderson;U.S., Geol. Surv., Profess. Papers,1954