by Philo G.R, Kolar C.A, Ashby W.C
Year of Publication 1982

by Philo G.R, Spaniol J.A, Kolar C.A, Ashby W.C
Published in Tree Planters' Notes U.S. Forest Service (1983)

by Ashby, W.C, Vogel, W.G, Kolar, C.A, Philo, G.R
Published in SSSA special publication (USA) (1984)