NMLP P-007470 · Point of issue · minted 2026-07-04
The Mixed-Up Files of Mrs. Basil E. Frankweiler
E.L. Konigsburg · Atheneum · 1967
Copyright page states 'First Edition' with no later-printing statement (Atheneum used a stated 'First Edition' in this era and did not adopt a number line until the mid-1980s)
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New Mexico Literacy Project — Point of issue NMLP P-007470 for "The Mixed-Up Files of Mrs. Basil E. Frankweiler" by E.L. Konigsburg (https://newmexicoliteracyproject.org/id/point/p-007470, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).