"Greenbaum, Wolff & Ernst." . . . . "Young People's Records, Inc. (N.Y.)" . . "Harper & Brothers." . . . . "Margaret Wise Brown Papers" . . . . . . . . . . . . . . . . . . . . "History" . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Records and correspondence" . "Literary manuscripts, correspondence, legal papers, biographical information, periodical publications, sound recordings, ephemera, and clippings." . . . . . . .