000 00326nam a2200109Ia 4500
008 160531s9999 xx 000 0 und d
100 _aDangermond, Jack.
245 _aUnderstanding Earth
245 _cby Jack Dangermond, Matt Artz
260 _c2012
856 _uhttp://www.gisday.com/resources/ebooks/understanding-earth.pdf
999 _c295087
_d295087