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Arboriculture & Urban Forestry Online
Vol. 17, No. 9 Contents September 1991
The Cost of Shade: Cost-Effectiveness of Trees Versus Bus Shelters    (View PDF)
E. Gregory McPherson and Sharon Biedenbender
Effects of a Deep Layer of Mulch on the Soil Environment and Tree Root Growth    (View PDF)
Gary W. Watson and Gary Kupkowski
Bacterial Species in Relation to Forest Tree Decline    (View PDF)
M. Scortichini, A. Belisario, and E. Motta
The California Tree Failure Report Program: An Overview    (View PDF)
L. R. Costello and A. M. Berry

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