Greg Davenport's advanced outdoor navigation : basics and beyond Davenport, Gregory J. Book - 2006 796.58 Dav Location Collection Call number Victoria Adult 796.58 Dav Available Place Hold
GPS made easy : using Global Positioning Systems in the outdoors Letham, Lawrence. Book - 2002 796.58028 Let Location Collection Call number Victoria Adult 796.58028 Let Available Place Hold