FYI, the book "Canoes and kayaks of Western America" / by Bill Durham. is available free at this link.
http://babel.hathitrust.org/cgi/pt?id=inu.30000007119856;view=1up;seq=1#view=1up;seq=16
http://babel.hathitrust.org/cgi/pt?id=inu.30000007119856;view=1up;seq=1#view=1up;seq=16