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McNeill, Bedford, m. 1916.

McNeill's code Arranged to meet the requirements of mi ning, metallurgical and civil engineers ; directors of mining, smetling and other companies... by Bedford Mc Neill - 807 páginas

Subjects--Topical Terms:
Cifras y claves telegraficas--Minas.

LC Class. No.: HE7677 .M6 / M2