Doonesbury by Garry Trudeau for April 19, 1971
B.D.: Hey, Mike! You've got a postcard from that little kid you tutor... Mike: Rufus? Say, that's right! He's visiting his cousin in New York.. "Dear Michael, I am here in Harlem and I must say it's just as bad as my ghetto at home. The crime is as high, the rats are as big...and the filth is omnipresent. I don't know if anyone has said this before, but as far as I'm concerned...if you've seen one ghetto, you've seen them all."