Verbatim text: Giannasi, D. E. and K. J. Niklas. 1977. Flavonoids and other constituents of fossil Miocene Celtis and Ulmus (Succor Creek Flora). Science 197: 765-767.
Author: Giannasi, D.E., Niklas, K.J.
Year: 1977
Title: Flavonoids and other constituents of fossil Miocene Celtis and Ulmus (Succor Creek Flora)
Journal: Science
Volume: 197
Pages: 765–767