Verbatim text: Hill, R. W. and W. H. Wagner Jr. 1974. Seasonality and spore type of pteridophytes in Michigan. Michigan Bot. 13: 40--44.
Author: Hill, R.W., Wagner, W.H. Jr.
Year: 1974
Title: Seasonality and spore type of pteridophytes in Michigan
Journal: Michigan Bot
Volume: 13
Pages: 40–44