Criteris tecniconormatius establits per l'INVASSAT - INVASSAT

1918 - H.J. Hickman. World War One, France: a radiographer wearing protective clothing and headpiece. Wellcome Library.

1924 - Agence Meurisse. Réfection de la peinture de la Tour Eiffel. Bibliothèque nationale de France.

1938 - Alan Villiers. Sailors working on a deck covered in mangrove poles. National Maritime Museum.

1940 - R.Y. Richie. Climax Molybdenum at Associated Oil Co. Ventura, California. March 1940. SMU Central University Libraries

1942 - John Vachon. Worker at carbon black plant, Sunray, Texas. Library of Congress.

1944 - Women volunteer grinding a billet of armour piercing steel at a munitions factory, Australia, 1944. National Library of Australia.

1953 - Bill Brindle. Opal miner, George Lowe chips away at the face of his opal mine, Lightning Ridge, 1953. National Library of Australia.

1956 - J.M. Pando. Interior de la fábrica : operario con mono de trabajo y guantes que sujeta una barra con metales incandescentes. . Archivo Pando...

1966 - J.M. Pando. Ejercicios de Seguridad en el Trabajo en la Región Valenciana. Operario trabajando con material eléctrico equipado de medidas de...

1973 - Dick Swanson. Painter working on chain link fence. U.S. National Archives

1993 - Soviet worker drenched with oil at a well in Lökbatan, in the suburbs of Baku. Azerbaijan, URSS vía Wikimedia Commons