WELTE, H. D.
Standard service geometry workbook, by H. D. Welte and F. B. Knight.
WELTE, H. D. Standard service geometry workbook, by H. D. Welte and F. B. Knight. © 30Sep29; AA25781. Scott, Foresman & Co. (PWH); 26Mar57; R188545.
Scott, Foresman & Co.|PWH