NMLP P-020301 · True-first precedence · minted 2026-07-04

Diversey

MacKinlay Kantor · Coward-McCann · 1928

US first (Coward-McCann, New York, 1928); scarce. No prior UK or other precedence.

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New Mexico Literacy Project — True-first precedence NMLP P-020301 for "Diversey" by MacKinlay Kantor (https://newmexicoliteracyproject.org/id/point/p-020301, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).