000			00295nam a22001217a 4500
999			_c2171 _d2171
020			_a978-1-68094-835-6
082			_aCir. 550 A77 C2019
100			_a3G E-learning
245			_aEarth science: world edition
260			_aUSA _b3G E-Learning _c2019
300			_aix,367p.: ill.; 230cm
942			_cBK