TY - JOUR T1 - The Natural Enemies of Shade Tree Pest Insects: A National Survey JF - Arboriculture & Urban Forestry (AUF) JO - JOA SP - 273 LP - 275 DO - 10.48044/jauf.1979.066 VL - 5 IS - 12 AU - William Olkowski AU - Linda Laub AU - Helga Olkowski Y1 - 1979/12/01 UR - http://auf.isa-arbor.com/content/5/12/273.abstract ER -