Structural cross-sections
MLA
Saarinen, Eero, 1910-1961. Structural cross-sections. Box 139, folder 294. 1949, undated. https://collections.library.yale.edu/catalog/10017578.
APA, 6th edition
Saarinen, Eero, 1910-1961. (["Box 139, folder 294"])(1949, undated)[Structural cross-sections]. https://collections.library.yale.edu/catalog/10017578.