Independent Productions Corporation ; International Union of Mine, Mill, and Smelter Workers ; director, Herbert Biberman ; producer, Paul Jarrico ; writer, Michael Wilson
Independent Productions Corporation and the International Union of Mine, Mill and Smelter Workers present ; [written] by Michael Wilson ; produced by Paul Jarrico ; directed by Herbert J. Biberman
Independent Productions Corporation ; International Union of Mine, Mill, and Smelter Workers ; director, Herbert Biberman ; producer, Paul Jarrico ; writer, Michael Wilson
Independent Productions Corporation ; International Union of Mine, Mill, and Smelter Workers present ; directed by Herbert Biberman ; produced by Paul Jarrico ; written by Michael Wilson