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Title: Iowa Geological Survey, Vol. XXIX. Annual reports, 1919 and 1920, with accompanying papers.
Description: 1920, 568 pp. 80 fig. 54 plts. Includes Thomas, A.O.: Echinoderms of the Iowa Devonian. pp. 385-551, 21 fig. 20 plts. /&/ A.W. Slocomb & A.F. Foerste: New echinoderms from the Maquoketa beds of Fayette County, Iowa; pp. 315--383, 5 fig. 6 plts. Orig. cloth, gilt, libr. stamp on title page, very good.

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