"Sandwich Seminar" (1975)

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SANDWICH SEMINAR--1,510 Google hits
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"Sandwich seminar" is not in OED. Anything in the proposed revision? I was
cleaning out this place and found this copy.
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I'm sending this one to the "Sandwich Lady."
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April/May 1975, Illegitimate Sun (parody of the Cornell Daily Sun), pg. 5,
col. 1:
_Women's Studies Sandwich Seminar: "Why Men Are So Nasty and How Us Women
Have to Stick Together"_--special guest speaker, Bernia Yorbrazeer,
Vice-President, New York City Chapter of FLOG (Feminist Liberation Organizing  Group),
Room 300, Noyes, 12:15 p.m.