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 an editorial board. prepared under the direction of the ASM International Handbook Committee ; Theodore J. Reinhart, technical chairman. prepared under the direction of the ASM Committee on Gas Carburizing. prepared under the direction of the ASM Handbook Committee ; Taylor Lyman, editor. prepared under the direction of the ASM Handbook Committee ; Howard E. Boyer, editor. prepared under the direction of Francis R. Valeo by Richard A. Baker. Prepared under the auspices of the SAE Fuels and Lubricants Activity Committee.