In the 1930s several theater groups in New York City experimented with works that bristled with radical dissent and propaganda. Of these productions, the most successful was a play whose final scene included a call to arms: "It's war! Working class, unite and fight! . . . These slick slobs stand there telling us about the bogeymen. That's a new one for the kids -- the reds is bogeymen! But the man who gave me food in 1932, he called me Comrade! The one who picked me up where I bled -- he called me Comrade too! What are we waiting for . . . STRIKE! STRIKE! STRIKE!" Name this play and its author.

All entries (one per person) must be clearly written on postcards and mailed to: Book Bag, The Washington Post, Washington, D.C. 20071, and must include complete return address and competition number. The winning entry will be the first correct answer drawn at random. Employees of The Washington Post Company and their families are not eligible to enter. Entries must be received no later than September 20. The winner's name and city of residence will be announced in the September 30 issue. A Washington Post Book World book bag will be sent to the winner. Answer to Book Bag #589: C.S. Lewis, after the death of his wife and writing under the name N.W. Clerk, published "A Grief Observed" in 1961. Winner: Alice R. Nelsen, Bowie. Clarification: The answer to Book Bag Contest 587, won by Adelaide L. Brown of Washington, should have indicated that in Jonathan Swift's Gulliver's Travels the countries of Lilliput and Blefuscu fight over whether to crack the large or the small end of an egg.