1. Hammad H. Y. A Hydrodynamic Theory of Water Movement Towards covered drains with Application to some Field Problems Alexandria University Press Alexandria Egypt 1957.
2. Hinesly T. D. “Shape of the Water‐table where Steady Rainfall seepage into Drains is Reinforced by Artesian Water ” thesis presented to Iowa State Univ. at Ames IA in 1961 in partial fulfillment of the requirements for the degree of Doctor of Philosophy.