Endurance tests of rolling contact bearings of conventional and high temperature steels under conditions simulating aircraft gas turbine applications : H. O. Walp and others, SKF Industries, Inc. for Wright Air Development Center, U.S. Air Force, July 1959, 78 pp. ; 12 graphs, 51 photos and drawings. (Order PB 161672 from OTS, U.S. Department of Commerce, Washington 25, D.C., $ 2.25)