1. American Ephemeris and Nautical Almanac, 1974. U.S. Govt. Printing Office, Washington, DC, 562 pp.
2. Revision of the genus Sagittaria (Alismataceae);Bogin;Mem. N.Y. Bot. Gard.,1955
3. Sex expression and growth in muskmelon;Brantley;Plant Physiol.,1960
4. Alismataceae;Buchenau;Pflanzenreich,1903
5. Studies in the Alismataceae. II. Inflorescences of Alismataceae;Charlton;Can. J. Bot.,1973