Verbatim text: Taylor, R.J. and T.F. Patterson. 1980. Biosystematics of Mexican spruce species and populations. Taxon 29: 421--469.
Author: Taylor, R.J., Patterson, T.F.
Year: 1980
Title: Biosystematics of Mexican spruce species and populations
Journal: Taxon
Volume: 29
Pages: 421–469