Cite

"Mode of Masking or Cutting off Sharply the Light..." (7341)

MLA

Beinecke, Edwin J. (Edwin John), 1886-1970. "Mode of Masking or Cutting off Sharply the Light..." (7341). Box 56, folder 1212. undated. https://collections.library.yale.edu/catalog/16609929.

APA, 6th edition

Beinecke, Edwin J. (Edwin John), 1886-1970. (["Box 56, folder 1212"])(undated)["Mode of Masking or Cutting off Sharply the Light..." (7341)]. https://collections.library.yale.edu/catalog/16609929.