Reference:Sinnott1983a
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Verbatim text: Sinnott, Q. P. and J. B. Phipps. 1983. Variation patterns in Crataegus series Pruinosae (Rosaceae) in southern Ontario. Syst. Bot. 8: 59–70.
Author: Sinnott, Q.P., Phipps, J.B.
Year: 1983
Title: Variation patterns in Crataegus series Pruinosae (Rosaceae) in southern Ontario
Journal: Syst. Bot
Volume: 8
Pages: 59–70