http://digfir-published.macmillanusa.com/video_human_comm/video_human_comm_ch285_1.htmlWalking (NEEDS IMPROVEMENT)52e2bb65757a2ed411000007
http://digfir-published.macmillanusa.com/video_human_comm/video_human_comm_ch285_1_dlap.xmlDLAP questions52e2bb65757a2ed411000007