United States. Department of Commerce
Published: 1976
Total Pages: 12
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The following items are revisions to NTIS General Catalog No. 4. General Catalog #5 is scheduled for publication in the spring of 1977. In the meantime, revisions to catalog #4 like this one, will be published when enough changes have occurred. The revision pages are slightly smaller than the General Catalog pages so that they may be easily inserted into the catalog.