Hawthorns of Berks County, Pa.
By: Comp. from field notes by C. L. Gruber.
Publisher: Press of the Hamburg item
Published: 1903
Place of publication: [Hamburg, Pa
Language: eng
Subjects: Hawthorns.; Botany -- Pennsylvania -- Berks County.
Notes: Parts 2-3 have title: Crataegus in Berks County.
Part I: Read before the Berks County Natural Science Club June 20, 1903; II: Proceedings of the Berks County Natural Science Club, October 1903; III: From the Bulletin of the Torrey Botanical Club, 32: 389-392.  1905.