D. G. O'Neill

Effect of date of application and form of nitrogen on herbage production in spring

R. Stevens, D. Kilpatrick, H. I. Gracey, 1989, The Journal of Agricultural Science.

The effect of avoparcin and monensin on the performance of growing and finishing cattle offered grass silage-based diets

R. Steen, E. Unsworth, T. A. Mccullough, 1985 .