Henry Potter's field guide to the hybrid ferns of the Northeast /
by Frank and Libby Thorne ; with foreword by David S. Barrington.
APA Citation
Potter, H., Thorne, L., Thorne, F. (1989). Henry Potter's field guide to the hybrid ferns of the Northeast. Woodstock, Vt.: Vermont Institute of Natural Science.
MLA Citation
Potter, Henry, 1891-1986, Libby Thorne, and Frank Thorne. Henry Potter's Field Guide to the Hybrid Ferns of the Northeast. Woodstock, Vt.: Vermont Institute of Natural Science, 1989.
Warning: These citations may not always be complete (especially for serials).