Beebe-Center, G. B. (1955). "George Howard Parker: 1864–1955". American Journal of Psychology. 68 (3): 492–494. JSTOR1418546. PMID13248993.
malacological.org
Coan, E. V.; Kabat, A. R.; Petit, R. E. (2010). 2,400 Years of Malacology(PDF) (7th ed.). American Malacological Society. p. 874. Archived from the original(PDF) on 2018-04-22. Retrieved 2012-12-20.
Beebe-Center, G. B. (1955). "George Howard Parker: 1864–1955". American Journal of Psychology. 68 (3): 492–494. JSTOR1418546. PMID13248993.
web.archive.org
Coan, E. V.; Kabat, A. R.; Petit, R. E. (2010). 2,400 Years of Malacology(PDF) (7th ed.). American Malacological Society. p. 874. Archived from the original(PDF) on 2018-04-22. Retrieved 2012-12-20.