prepared under the direction of Amadou-Mahtar M'Bow. Prepared under the direction of Thomas D. Wood. prepared under the direction of W. R. Thompson. prepared under the direction of an Editorial Board. prepared under the direction of Charles P. Howland. prepared under the direction of Herbert Myrick. prepared under the direction of Edwin D. Goldfield. prepared under the direction of the ASM Handbook Committee. prepared under the direction of the chief of engineers. prepared under the direction of the American Geological Institute.