Doonesbury by Garry Trudeau for May 19, 1976
Transcript:
Man: Sorry, Clyde, no offense, but Ms. Slade is pretty high rent for cats like us, what with her law school education and such... Clyde: Hey, c'mon, man - she's there on a scholarship! Ginny's paid her dues much as any folks around! Man: Regular people, huh? Clyde: Sure, man! Man: Then how we've never seen her here at Burger King? Man: Yeah? Clyde: So she don't like Whoppers - sue her!