NATIONAL TUBE COMPANY. Bulletin. No. 7, 10, 12, 13, 25B, 26A. no. 13. National hammer-weld pipe, 20 to 96 inches. 2d ed.
NATIONAL TUBE COMPANY. Bulletin. No. 7, 10, 12, 13, 25B, 26A. © United States Steel Co. (PWH) no. 13. National hammer-weld pipe, 20 to 96 inches. 2d ed. © 23Aug24, A803908. R91364, 6Mar52.
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