A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Marking of gold filled and rolled gold plate articles other than watchcases
Standard covers marking of gold-covered articles which are defined, other than watchcases, offered for sale in United States. Designated by American Standards Association as American Standard Z31-1933. (5¢)
Marking of gold filled and rolled gold plate articles other than watchcases
Standard covers marking of gold-covered articles which are defined, other than watchcases, offered for sale in United States. Designated by American Standards Association as American Standard Z31-1933. (5¢)
Marking of gold filled and rolled gold plate articles other than watchcases
U S Bur Standards -- Commercial Standard
1934
9 pages
Standard
English
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