Prepared under the direction of the Technical Practice Committee. prepared under the direction of the Metals Handbook Committee. prepared under the direction of the ASM International Handbook Committee. prepared under the direction of the American Geological Institute. Prepared under the direction of the American Geological Institute. prepared under the direction of the Chief Signal Officer. prepared under the direction of an editorial board. prepared under the direction of Kathrine O. Murra. prepared under the direction of the ASM Committee on Gas Carburizing. prepared under the direction of the ASM handbook committee ; Taylor Lyman, editor.