@book{29218,
	author = {Hacquébard, Piet Albertus. and Barss, M. S.,},
	title = {A Carboniferous spore assemblage,},
	publisher = {E. Cloutier, Queen's printer,},
	year = {1957.},
	address = {Ottawa,},
	note = {At head of title: Canada.  Dept. of Mines and Technical Surveys.}
}