Undersander et al., 1991. in Alternative Field Crop Manual, University of Wisconsin, University of Minnesota
Document reference
Undersander, D. J. ; Putnam, D. H. ; Kaminski, A. R. ; Kelling, K. A. ; Doll, J. D. ; Oplinger, E. S. ; Gunsolus, J. L., 1991. Guar. in Alternative Field Crop Manual, University of Wisconsin, University of Minnesota