That is a book- modern reprint available- that the gubment published in the late 50s. Originals are collectible, but the fine, hard bound reprint is available from BMG Parts Co, and other sources. Retail is $69.95, and well worth every penny.Thank you again Luck313 - Will look for a copy of the manual you cited. Are there any manuals etc for the later M1917A1 tripod?