Title: Biblio RTF Export
Author: Biblio 7.x

H. L.  CHAMBERS and CHAMBERS, K. L., ?ARTIFICIAL AND NATURAL HYBRIDS IN PYCNANTHEMUM (LABIATAE)?, Brittonia, vol. 23, p. 71?{&}, 1971.

H. L.  CHAMBERS, ?Chromosome Survey and Analysis of Artificial Hybrids in Pycnanthemum?, Castanea, vol. 58, pp. 197?208, 1993.