00867cam a2200253Ka 4500007291244MiAaHDL20141009010000.0m d cr bn ---auaua940919s1921 dcu f000 0 eng dNZ112320286sdr-uiuc6406952sdr-miu.990072912440106381(OCoLC)31141081INDINDIULOCLCQLHLUIUUQC100.Un3 no. 42 1921C 13.4:42/921United States.Bureau of Standards.Metallographic testing.2d ed.Washington :G.P.O.,1921.11 p. ;25 cm.Circular of the Bureau of Standards ;no. 42"August 29, 1921."Mode of access: Internet.Online version:United States. Bureau of Standards.Metallographic testing.2d ed.Washington : G.P.O., 1921(OCoLC)63256379000729124420101112084826.020141009010000.020141112165512.02025-01-02T19:14:08Z2025-01-02T18:30:02ZSDR-UIUCUNKNOWNloader.pl-003-020BKsdr-uiuc6406952uiugSDRUIUCuiug.30112106919852UIU6406952UIUUIUC20250102googleuiug.301121069198521921pdbibUS fed docMIUGWLA20260308googlemdp.390150772928061921pdbibUS fed doc