A. George Mallis 1990. 8 1/2 x 11 inch comb bound. 39 leaves, xeroxed sheets, most printed on both sides. R. George Mallis is a member of the International Society of Antique Scale Collectors and this was his attempt to begin some standardization in the area. Pale light blue (now faded) printed covers. Includes the errata sheet. Minor wear and a bit of curling to the paper, small spots to the front cover and more soiling to the rear cover. Very Good. Comb Bound. 
This copy (although unmarked) is from George's estate a portion of which we purchased at Skinners some years ago.