1. Adoption of rollover protective structures(ROPS)on U.S. farm tractors by state: 1993-1995, 2001, and 2004 Collection: Agricultural Communications Documentation Center (ACDC) Contributers: Hard, D.L. (author) and Myers, J.R. (author) Format: Editorial Publication Date: 2011 Published: USA Location: Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 197 Document Number: D09471 Journal Title: Journal of agricultural safety and health Journal Title Details: 17(2) : 157-172
2. Slow to catch on to the slow-moving vehicle emblem Collection: Agricultural Communications Documentation Center (ACDC) Contributers: Lehtola, Carol J. (author) Format: Editorial Publication Date: 2007 Published: USA Location: Agricultural Communications Documentation Center, Funk Library, University of Illinois Box: 197 Document Number: D09467 Journal Title: Journal of agricultural safety and health Journal Title Details: 13(1) : 5-7 Notes: Analysis of state driver's manuals shows lack of consistency, conflicting information and other issues.