Kidwell, P. A. (2003). An erasable surface as instrument and product: The blackboard enters the American classroom - 1800 - 1915.
Chicago Style (17th ed.) CitationKidwell, Peggy Aldrich. An Erasable Surface as Instrument and Product: The Blackboard Enters the American Classroom - 1800 - 1915. 2003.
MLA (9th ed.) CitationKidwell, Peggy Aldrich. An Erasable Surface as Instrument and Product: The Blackboard Enters the American Classroom - 1800 - 1915. 2003.
Warning: These citations may not always be 100% accurate.