Correlation of the Devonian sedimentary formations of North America Cooper, G. A. ; Butts, C. ; Caster, K. E. ; Chadwick, G. H. ; Goldring, W. ; Kindle, E. M. ; Kirk, E. ; Merriam, C. W. ; Swartz, F. M. ; Warren, P. S. ; Warthin, A. S. ; Willard, B. Abstract Publication: Geological Society of America Bulletin Pub Date: December 1942 DOI: 10.1130/GSAB-53-1729 Bibcode: 1942GSAB...53.1729C