File:Gladkov-sementti-1928.jpg

Cover of Fyodor Gladkov's Cement Published in Astoria, Oregon by Amerikan Suomalaisten Sosialististen Kustannusliikkeiden Kustantama, 1928 Published in the United States between 1923 and 1978 with no copyright notice in original publication, public domain Specimen in the Tim Davenport collection, digitized for Wikipedia by Tim Davenport ("Carrite"), no copyright claimed. Image released to the public domain without restriction.