Lord, T. R., & Travis, H. J. (2006). The ferns and allied plants of Pennsylvania. Indiana, Pa.: Dept. of Biology, Indiana University of Pennsylvania.
Chicago Style CitationLord, Thomas R., and Holly J. Travis. The Ferns and Allied Plants of Pennsylvania. Indiana, Pa.: Dept. of Biology, Indiana University of Pennsylvania, 2006.
MLA CitationLord, Thomas R., and Holly J. Travis. The Ferns and Allied Plants of Pennsylvania. Indiana, Pa.: Dept. of Biology, Indiana University of Pennsylvania, 2006.
Warning: These citations may not always be 100% accurate.