https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/8786618Edit ImageSaveSaveEditCropCustom TextDie Gewinnung des Diphtherieserums aus Pferdeblut im Behringwerk zu Marburg. Four men in white smocks extract blood from two horses in a stable. Original public domain image from FlickrMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 905 px | 300 dpiLarge JPEG 2500 x 1885 px | 300 dpiFree DownloadDie Gewinnung des Diphtherieserums aus Pferdeblut im Behringwerk zu Marburg. Four men in white smocks extract blood from two horses in a stable. Original public domain image from FlickrMore