Spring balances (2)

Chicago citation style
Spring balances (2). Retrieved from the Digital Public Library of America, http://archives-dc.library.caltech.edu/islandora/object/ct1%3A40. (Accessed December 14, 2018.)
APA citation style
Spring balances (2). Retrieved from the Digital Public Library of America, http://archives-dc.library.caltech.edu/islandora/object/ct1%3A40
MLA citation style
Retrieved from the Digital Public Library of America <http://archives-dc.library.caltech.edu/islandora/object/ct1%3A40>.
Note: These citations are programmatically generated and may be incomplete.