Distribution and stratigraphic significance of small spore genera in the Upper Carboniferous of the Maritime Provinces of Canada.
Reference:
Hacquebard,P.A. et al. (1961)
Distribution and stratigraphic significance of small spore genera in the Upper Carboniferous of the Maritime Provinces of Canada. Geological Survey of Canada,Reprint 31,(Reprinted From on Carboniferstratigraphy&Geology, Heerlen,Vo L.1,Pp 237-245,1960.).
P. 237- 245