by Beckjord P.R, Melhuish J.H. Jr, Kundt J.F
Published in Journal of environmental horticulture (01.09.1985)

by Beckjord, P.R, Cech, F.C
Published in Tree Planters' Notes U.S. Forest Service (1980)

by Beckjord P.R
Published in Tree Planters' Notes U.S. Forest Service (1984)

by Beckjord P.R
Published in Tree Planters' Notes U.S. Forest Service (1982)

by Beckjord P.R, McIntosh M.S
Published in Canadian Journal of Botany (1984)

by Beckjord P.R, McIntosh M.S
Published in Southern journal of applied forestry (01.05.1983)

by Melhuish, J.H. Jr, Beckjord, P.R, Vogel, W.G
Published in Transactions of the Kentucky Academy of Science (USA) (01.03.1987)

by Beckjord, P.R, Melhuish, J.H. Jr, Hacskaylo, E
Published in Journal of environmental horticulture (01.12.1986)

by Beckjord, P.R, Adams, R.E, Smith, D.W
Published in Forest science (01.12.1980)

by Beckjord, P.R, Melhuish, J.L. Jr, Crews, J.T, Farr, D.F
Published in Tree planters' notes - U.S. Department of Agriculture, Forest Service (USA) (1990)

by Beckjord P.R, Smith D.W, McIntosh M.S
Published in Forest science (1984)

by Beckjord, P.R. (National Paulownia Center, Beltsville, MD), Melhuish, J.H. Jr
Published in Transactions of the Kentucky Academy of Science (USA) (01.09.1991)

by Beckjord, P.R, Hacskaylo, E
Published in Bulletin of the Torrey Botanical Club (01.04.1984)

by Beckjord, P.R, Melhuish, J.H. Jr, McIntosh, M.S
Published in Canadian journal of botany (1985)

by Beckjord, P.R, Melhuish, J.H. Jr, McIntosh, M.S, Hacskaylo, E
Published in Canadian journal of botany (1983)

by Beckjord P.R, McIntosh M.S
Published in Bulletin of the Torrey Botanical Club (01.01.1983)