^"Big Radium Owner Threatens A Strike. O. B. Willmarth Indignant At Secretary Lane's Announced Policy". New York Times. January 16, 1914. Retrieved 2010-07-03. A suggestion was made yesterday by O. Barlow Willmarth, President of the Colorado Carnotite Company, which controls ore deposits from which nearly a half of the world's available supply of radium has been extracted, that American radium producers might soon shut down their works as a protest against the threatened governmental policy of withdrawing all radium producing lands from entry.