by Hawksworth F.G
Published in USDA Forest Service General Technical Report RM (USA). no. 48 (1977)

by Hawksworth F.G, Johnson D.W
Published in General technical report RM (USA). no. 225 (1993)

by Hawksworth F.G, Edminster C.B
Published in USDA Forest Service Research Note RM (USA). no. 412 (1981)

by Hawksworth F.G, Sharpf R.G
Published in Forest insect and disease leaflet - United States Dept. of Agriculture Forest Service (USA). no. 164 (1981)

by Drummond D.B, Hawksworth F.G
Published in Report - United States (1979)

by Johnson D.W, Hawksworth F.G, Drummond D.B
Published in Report - United States (1979)

by Johnson D.W, Hawksworth F.G, Drummond D.B
Published in Report - United States (1978)

by Dixon, G.E, Hawksworth, F.G
Published in Forest science (1979)

by Hawksworth, F.G. (Rocky Mountain Forest and Range Experiment Station, Fort Collins, CO (USA)), Scharpf, R.F
Published in European journal of forest pathology (01.01.1986)

by Hawksworth, F.G, Wiens, D
Published in Brittonia (01.07.1980)

by Scharpf, R.F, Hawksworth, F.G
Published in Plant Disease Reporter (1976)

by Hawksworth, F.G, Fisher, J.T, Mathiasen, R.L
Published in Plant Disease Reporter (1975)

by Hawksworth, F.G
Published in The Green thumb (USA) (1987)

by Hawksworth, F.G
Published in Reprints - United States, Forest Service (1971)

by Reich, R.M, Mielke, P.W. Jr, Hawksworth, F.G
Published in Canadian journal of forest research (01.12.1991)

by Barney, C.W, Hawksworth, F.G, Geils, B.W
Published in European journal of forest pathology (1998)

by Hawksworth, F.G, Wiens, D
Published in Kew bulletin (1976)

by Wicker, E.F, Hawksworth, F.G
Published in General technical report INT - U.S. Department of Agriculture, Forest Service, Intermountain Research Station (USA) (01.04.1988)

by Stevens R.E, Hawksworth F.G
Published in General technical report RM Rocky Mountain Forest and Range Experiment Station, United States, Forest Service (1984)

by Johnson, D.W, Hawksworth, F.G
Published in Technical report R2 - U.S. Department of Agriculture, Forest Service, Forest Pest Management (USA) (01.03.1988)