prepared under the direction of the ASM International Handbook Committee. prepared under the direction of the ASM Handbook Committee. prepared under the direction of the American Geological Institute. prepared under the direction of the Committee on Personnel Advancement prepared under the direction of the chief of engineers. prepared under the direction of the ASM International Handbook Committee ; Theodore J. Reinhart, technical chairman. prepared under the direction of an Editorial Board. prepared under the direction of the ASM Committee on Gas Carburizing. prepared under the auspices of the SAE Spring Committee. prepared under the direction of the ASM International Handbook Committee ; D.U. Furrer and S.L. Semiatin, volume editors.