Books by H. L. Mason:
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Mason, H. L. (Herbert Louis), 1896-1994, contrib.: Studies of the Pleistocene Palaeobotany of California (Carnegie Institution of Washington publication #415; 1934), also contrib. by Ralph W. Chaney and Susan S. Potbury (page images at HathiTrust)
Additional books by H. L. Mason in the extended shelves:
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Mason, H. L. (Herbert Louis), 1896-1994: Additions to the palaeontology of the Pacific coast and Great Basin regions of North America (The Carnegie institution of Washington, 1927), also by Remington Kellogg, Ralph W. Chaney, Chester Stock, and John C. Merriam (page images at HathiTrust)- Mason, H. L. (Herbert Louis), 1896-1994: The genus Dodecatheon: a systematic and experimental study ([Berkeley], 1923) (page images at HathiTrust)
- Mason, H. L. (Herbert Louis), 1896-1994: Report of the Subcommittee on the Scenic, Scientific, and Educational Values of the Natural Landscape of California (Department of Parks and Recreation, 1970), also by Scientific California. Subcommittee on Scenic (page images at HathiTrust)
- Mason, H. L. (Herbert Louis), 1896-1994: The scenic, scientific, and educational values of the natural landscape of California : r̈eport of the Subcommittee on the Scenic, Scientific, and Educational Values of the Natural Landscape of California ̈ (Dept. of Parks and Recreation, 1970), also by Scientific California. Subcommittee on the Scenic (page images at HathiTrust)
Find more by H. L. Mason at your library, or elsewhere.