by McIver, J.D, Adams, P.V, Doyal, J.A, Drews, E.S, Hartsough, B.R, Kellogg, L.D, Niwa, C.G, Ottmar, R, Peck, R, Taratoot, M, Torgersen, T, Youngblood, A
Published in Western journal of applied forestry (01.10.2003)

by Stipe L.E, Niwa C.G, Eder R.G
Published in Report - USDA Forest Service (1984)

by Smith, J.E, McKay, D, Niwa, C.G, Thies, W.G, Brenner, G, Spatafora, J.W
Published in Canadian journal of forest research (01.12.2004)

by Peck, R.W, Niwa, C.G
Published in Environmental entomology (01.06.2005)

by Kerns, Becky K., Thies, Walter G., Niwa, Christine G.
Published in Écoscience (Sainte-Foy) (01.01.2006)

by DeBarr, G.L, Hanula, J.L, Niwa, C.G, Nord, J.C
Published in Canadian entomologist (01.06.2000)

by Niwa, C.G. (USDA Forest Service, Corvallis, OR), Overhulser, D.L
Published in Journal of economic entomology (01.12.1992)

by Niwa, C.G. (Pacific Northwest Research Station, USDA, FS, Corvallis, OR.)
Published in Journal of economic entomology (01.08.1995)

by Niwa, C.G. (Pacific Northwest Research Station, USDA-Forest Service, Corvallis, OR), Sower, L.L
Published in Environmental entomology (01.12.1992)

by Niwa, C.G
Published in Canadian entomologist (01.10.1988)

by Niwa, C.G, Stelzer, M.J, Beckwith, R.C
Published in Journal of economic entomology (01.08.1987)

by Niwa, C.G, Daterman, G.E, Sartwell, C, Sower, L.L
Published in Environmental entomology (01.06.1988)

by Niwa, C.G. (Pacific Northwest Research Station, Forestry Sciences Laboratory, USDA, Forest Service, Corvallis, OR), Daterman, G.E
Published in Environmental entomology (01.08.1989)

by Stipe, L.E, Niwa, C.G, Eder, R.G
Published in Report - USDA Forest Service, Northern Region (1984)

by Halstead, J.A, Niwa, C.G
Published in The Pan-Pacific entomologist (01.07.1987)