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General Research Division, The New York Public Library. "The Introspectometer, designed by Lippincott & Margulies, Inc." The New York Public Library Digital Collections. 1957-06. https://qa-digitalcollections.nypl.org/items/9d6792e0-0f3f-013a-4fdf-0242ac110003
General Research Division, The New York Public Library. "The Introspectometer, designed by Lippincott & Margulies, Inc." New York Public Library Digital Collections. Accessed December 11, 2024. https://qa-digitalcollections.nypl.org/items/9d6792e0-0f3f-013a-4fdf-0242ac110003
General Research Division, The New York Public Library. (1957-06). The Introspectometer, designed by Lippincott & Margulies, Inc. Retrieved from https://qa-digitalcollections.nypl.org/items/9d6792e0-0f3f-013a-4fdf-0242ac110003
<ref name=NYPL>{{cite web | url=https://qa-digitalcollections.nypl.org/items/9d6792e0-0f3f-013a-4fdf-0242ac110003 | title=
(still image)
The Introspectometer, designed by Lippincott & Margulies, Inc., (1957-06)
|author=Digital Collections, The New York Public Library |accessdate=December 11, 2024 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>