Little, Brown & Co.—34 Beacon Street, Boston 6, Mass.
Liveright Publishing Corp.—386 Fourth St, NYC 16, NY
Robert M. McBride.—235 Fourth Avenue, NYC 3, NY
McDowell, Oblensky, Inc.—219 E. 61st St, NYC (no zone listed)
McGraw-Hill Book Co., Inc.—330 West 42nd St, NYC 36, NY
David McKay Co., Inc.—119 West 40th St, NYC 18, NY
Macauley Co.—(Book Sales, Inc, 352 Fourth Ave, NYC 10, NY)
Macmillan Co.—60 Fifth Avenue, NYC 11, NY
Julian Messner, Inc.—8 W. 40th St, NYC 18, NY
Wm. Morrow & Co., Inc.—425 Fourth Avenue, NYC 16, NY