Beckman Room blackboard

Chicago citation style
Beckman Room blackboard. 1990~. Retrieved from the Digital Public Library of America, http://archives-dc.library.caltech.edu/islandora/object/ct1%3A2428. (Accessed December 13, 2018.)
APA citation style
(1990~) Beckman Room blackboard. Retrieved from the Digital Public Library of America, http://archives-dc.library.caltech.edu/islandora/object/ct1%3A2428
MLA citation style
Retrieved from the Digital Public Library of America <http://archives-dc.library.caltech.edu/islandora/object/ct1%3A2428>.
Note: These citations are programmatically generated and may be incomplete.