1. The free surface around, and interference between, gravity wells;Babbitt;Univ. Ill. Eng. Expt. Sta. Bull.,1948
2. Unsteady radial flow to a pumped well allowing for delayed yield from storage;Boulton;Intern. Assoc. Sci. Hydrol.,1954
3. Analysis of data from nonequilibrium pumping tests allowing for delayed yield from storage;Boulton;Inst. Civil Eng. Proc. (London),1963
4. Seepage through dams;Casagrande;New Eng. Water Works Assoc. J.,1937