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Series IV. Technical Drawings, 1906-1981

Scope and Content Notes:

This series includes technical drawings, arranged alphabetically by company name.

Roll 37-50 American Gas and Electric
Roll 51 Allegheny Pittsburgh Coal -- Windsor Power House Coal

Map-case 9-5
Folder 5 Aluminum Company of America -- Bethlehem Steel Bridge
Folder 6 Consolidation Coal -- Windsor Power House Coal