Robert, P. C. Proceedings of site-specific management for agricultural systems: second international conference, March 27 - 30, 1994, Minneapolis, Mn. / editors: P. C. Robert, R. H. Rust and W.E. Larson. - [S.l.]: University of Minnesota, c1995. - xiv, 293 p. ISBN: 089118127x Subjects--Topical Terms: Agricultural systems--Management.