1917-1952 changes were indicated as they occurred in color coding on 200 plan size folded maps on file at Dept.'s Design Section.

""The familiar actions and the turn-around format make this useful for pre-school storytime, and appealing to very young children."" (School Library Journal) ""With a corps of frisky, balletically capering porkers and a circular counting rhyme that can be started from either end of the book, Paparone and Roth take children cycling from mud puddle to bathtub and back."" (Booklist) ""The stories work well together, and you can expect to be asked to flip it over and over so listeners can pore over the details in the illustrations."" (The Horn Book Guide)