Matches in Library of Congress for { ?s ?p Frost, Helen, 1949- Looking at simple machines.. }
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- 00009866 isPartOf "Frost, Helen, 1949- Looking at simple machines.".
- 00009867 isPartOf "Frost, Helen, 1949- Looking at simple machines.".
- 00009868 isPartOf "Frost, Helen, 1949- Looking at simple machines.".
- 00009869 isPartOf "Frost, Helen, 1949- Looking at simple machines.".
- 00009870 isPartOf "Frost, Helen, 1949- Looking at simple machines.".
- 00009871 isPartOf "Frost, Helen, 1949- Looking at simple machines.".