American Society for Testing and Materials International (ASTM):

Consumer Product Safety Commission (CPSC):

Consumer Product Safety Commission Designation #325:

Accessible Play Areas: A Summary of Accessibility Guidelines for Play Areas

International Play Equipment Manufacturers Association (IPEMA):

National Recreation and Park Association (NRPA):

National Recreation and Park Association –

(NRPA) Playground Safety:

National Playground Contractors Association International (NPCAI):

The Play & Playground Encyclopedia:

Slyde The Playground Hound:






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