NMLP P-027895 · True-first precedence · minted 2026-07-04

The Masks of Time

Robert Silverberg · Ballantine · 1968

US Ballantine paperback original (U6121, 1968) is the true first; there is no earlier hardcover.

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New Mexico Literacy Project — True-first precedence NMLP P-027895 for "The Masks of Time" by Robert Silverberg (https://newmexicoliteracyproject.org/id/point/p-027895, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).