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New Mexico Literacy Project — Point of issue NMLP P-038670 for "The Skylark of Space" by E. E. 'Doc' Smith (in collaboration with Mrs. Lee Hawkins Garby) (https://newmexicoliteracyproject.org/id/point/p-038670, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).