Arborists' Knots for Climbing & Rigging: CEU Workbook by International Society of Arboriculture
This illustrated workbook accompanies the Arborists' Knots for Climbing & Rigging DVD set . You can earn two CEUs* by completing the workbook test answer sheets, returning them to ISA for grading, and receiving a score of 80% or greater. [*These CEUs may be submitted only once during the life of your certification.]