J.L. Havlin

Long-term agricultural research (LTAR): A research, education, and extension imperative
Robertson, G. P., V.G. Allen, G. Boody, E.R. Boose, N.G. Creamer, L.E. Drinkwater, J.R. Gosz, et al. 2008. “Long-Term Agricultural Research (LTAR): A Research, Education, and Extension Imperative”. BioScience 58: 640-45.