000			00271nam a2200109Ia 4500
008			230718s9999||||xx |||||||||||||| ||und||
041			_aeng
082			_bT17 LEA _a510
245		0	_a Discrete mathematics _b: 3g e-learning
260			_b 3G E-Learning _c2017
942			_cBK
999			_c10889 _d10889