https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/12240024Edit ImageSaveSaveEditCropCustom TextRobert E. Wilson, consultant, petroleum unit, Chemical and Allied Products Section, Materials Branch, Office of Production Management (OPM). Sourced from the Library of Congress.View public domain image source hereMorePublic DomainFree CCO U.S. Government image for Personal and Business useInfoView CC0 LicenseEditorial use only JPEGTIFFSmall JPEG 926 x 1200 px | 300 dpiLarge JPEG 2702 x 3500 px | 300 dpiBest Quality JPEG 4345 x 5628 px | 300 dpiTIFF 4345 x 5628 px | 300 dpi | 23.35 MBFree DownloadRobert E. Wilson, consultant, petroleum unit, Chemical and Allied Products Section, Materials Branch, Office of Production Management (OPM). Sourced from the Library of Congress.More