Elmer Thomas, migrant to California, pouring oil into engine preparatory for departure to California. Oklahoma by Russell Lee https://www.rawpixel.com/image/12175071/image-plant-person-artFree Image from public domain licenseBLM Equipment InspectionsThe Bureau of Land Management sent Equipment Shop employees to the BFX Fire Apparatus factory in… https://www.rawpixel.com/image/11071532/photo-image-fire-public-domain-factoryFree Image from public domain licenseEngine blocks for the Army's new halftrac scout cars. They represent the latest and best thought in automotive foundry and… https://www.rawpixel.com/image/12306809/image-plant-person-artFree Image from public domain license[Untitled photo, possibly related to: Waiting for instructions to take off. Washington D.C. municipal airport]. Sourced from… https://www.rawpixel.com/image/12325067/image-person-airplane-public-domainFree Image from public domain license[Untitled photo, possibly related to: Holabird ordnance depot, Baltimore, Maryland]. Sourced from the Library of Congress. https://www.rawpixel.com/image/12294259/photo-image-person-public-domain-manFree Image from public domain licenseWinslow, Arizona. Looking through the windshield of a diesel freight engine pulling out of the Atchison, Topeka and Santa Fe… https://www.rawpixel.com/image/12293696/photo-image-sky-smoke-public-domainFree Image from public domain licenseThe San Francisco peaks, in the Sierra Nevada range near the California border, seen through the engineer's window of a… https://www.rawpixel.com/image/12292287/photo-image-border-sky-lightFree Image from public domain license