ICOH one hundred and the Simplon tunnel.
Hobson
John
J
D003226:Congresses as Topic / Q000266:history*; D004738:Engineering / Q000266:history*; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007558:Italy; D009784:Occupational Diseases / Q000266:history; D016272:Occupational Health / Q000266:history*; D009787:Occupational Medicine / Q000266:history