Burton, Virginia Lee. Mike Mulligan and His Steam Shovel.
Boston: Houghton Mifflin, 1939.
Virginia Lee Burton Papers, Ax 839.

Original sketch for Mike Mulligan and His Steam Shovel, page 33.
Virginia Lee Burton Papers, Ax 839.

Original sketch for page 19 of
Mike Mulligan and His Steam Shovel.
Virginia Lee Burton Papers, Ax 839.

Original sketches for pages 2 and 3 of
Mike Mulligan and His Steam Shovel.
Virginia Lee Burton Papers Ax 839.