Instructions for Erecting and Caring for Dempster No. 12 and 12A Windmills, originally published in the 1930s by the Dempster Mill Manufacturing Company, Beatrice, Neb. 8½ x 11 paperback, 6 pages. Reprinted in 2023 by Nation Builder Books, Mebane, NC.
Please note this is a new, photocopied reproduction, not an original. The accompanying picture was scanned from a reprint, not the original.