Matches in Library of Congress for { ?s ?p Classification, Universal decimal Programmed instruction.. }
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- 70454654 subject "Classification, Universal decimal Programmed instruction.".
- 73007963 subject "Classification, Universal decimal Programmed instruction.".
- 78632221 subject "Classification, Universal decimal Programmed instruction.".
- 79475674 subject "Classification, Universal decimal Programmed instruction.".