Ordnance provision system. [Ordnance catalog (ordnance provision system): [Group G], Tractor, ord., heavy M1 (International Harvester Co. TD-18, Diesel), major items, maintenance parts, and equipment required for maintenance of tractor, ord., heavy M1 (International Harvester Co. TD-18, Diesel), tentative addendum; Aug. 1, 1942.

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