Building the Health Bridge, Selections from the Works of Fred L. Soper, M.D., edited by J. Austin Kerr. xxxvii + 567 pages. Indiana University Press, Bloomington, Indiana. 1970. $17.50.

Canine Heartworm Disease, A Discussion of the Current Knowledge, Proceedings of the First International Symposium on Canine Heartworm Disease, Gainesville, 1969, edited by Richard E. Bradley, Department of Veterinary Science, University of Florida. 135 pages, illustrated, paperbound. Department of Veterinary Science, University of Florida, Gainesville, Florida 32601. 1970. $10.00.

Cellulose Acetate Electrophoresis: Techniques and Applications, by H. P. Chin, University of Southern California. vii + 139 pages, illustrated. Ann Arbor-Humphrey Science Publishers Inc., Drawer No. 1425, Ann Arbor, Michigan 48106. 1970. $15.75.

Community Water Supply in Developing Countries: A Quarter-Century of United States Assistance, by Frederick E. McJunkin, University of North Carolina, Chapel Hill. x + 85 pages, illustrated, paperbound. Chapel Hill, North Carolina, for the Office of War on Hunger, United States Agency for International Development. 1969. No price.