Heath, R. C. 1983. Basic Ground-Water Hydrology (WSP-2220). 84 pp., size 8.5" x 11". Description: This publication consists of 45 sections on the basic elements of ground-water hydrology, arranged in order from the most basic aspects through a discussion of the methods used to determine the yields of aquifers to a discussion of common problems encountered in the operation of ground-water supplies. Each section consists of a brief text and one or more drawings or maps that illustrate the main points covered in the text.