(Received 8 January 1982; accepted 23 February 1982)
Published Online: 1982
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This study indicates that a scanning monochromator can replace long-pass filters in examining questioned documents using infrared techniques. The use of the monochromator may increase the capability of the examiner to restore obliterated writings.
Special agent, U.S. Department of Justice, FBI, Washington, DC
Stock #: JFS12211J