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"The Last Day of School 28 June 1900" - no postmark 1975	Pittsburg Schools - newspaper photo 1904	PHS Students Purple & White - reproduction postcard 1909	Pittsburg Schools - postmarked 1912

"The Last Day of School, June 28, 1900," unused postcard, Graphics Arts Club, KSCP, 1975
"A Group of Pittsburg Schools," Pittsburg Headlight [Pittsburg Kansas] 8 Sept 1904: Newspapers.com. Web
PHS Students, photo postcard, Leonard H. Axe Library, PSU, Arcardia Publishing. 2008
"Four of the City Schools," postcard, postmarked 1912