POP-UP. (BLUE RIBBON) THE POP-UP MOTHER GOOSE by Harold Lentz. NY: Blue Ribbon (1934). 4to, pictorial boards, bottom of spine sl. worn and one of the goose's wings has been neatly reinforced else else VG+. Illustrated by HAROLD LENTZ with 3 great double-page color pop-ups plus many b&w's. See Whitten: Paper Toys of the World p.75 for photo.