Verbatim text: Bailey, D.K. and F.G. Hawksworth. 1979. Pinyons of the Chihuahuan Desert region. Phytologia 44: 129--133.
Author: Bailey, D.K., Hawksworth, F.G.
Year: 1979
Title: Pinyons of the Chihuahuan Desert region
Journal: Phytologia
Volume: 44
Pages: 129–133