RT Journal Article SR Electronic T1 EPA Spill Regulations JF Arboriculture & Urban Forestry JO JOA FD International Society of Arboriculture SP 239 OP 240 DO 10.48044/jauf.1978.059 VO 4 IS 10 YR 1978 UL http://auf.isa-arbor.com/content/4/10/239.abstract