HCO MASTER FILE

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Definitions

everything pertaining to technology, i.e. books, leaflets, magazines, tapes, technical bulletins and including other bulletins and all policy letters are to be stamped: HCO MASTER FILE DO NOT REMOVE and HCO Master Files are to receive two of each of the above items with the exception of tapes where there is only one master copy. (HCO PL 25 Feb 59)