Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
National Federation of Iron & Steel Manuf., report
Typed in black ink on cream paper. 14 pages stapled together. Title: 'Methods of Concentration of Minnesota Iron Ores Investigated by the Minnesota School of Mines'. Dated 1st January 1932.
Pwnc
Diwydiant
Rhif yr Eitem
86.129I/733
Derbyniad
Bequest, 8/9/1986
Mesuriadau
Meithder
(mm): 332
Lled
(mm): 204
Deunydd
papur
Lleoliad
In store
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