@book{20662,
	author = {Pennsylvania.},
	title = {Courses of study in history and social science, years VII-XII.},
	publisher = {J.L.L. Kuhn, printer to the commonwealth,},
	year = {1923.},
	address = {Harrisburg, Pa.,},
	note = {At head of title: Commonwealth of Pennsylvania.  Department of  public instruction.}
}