00484nam a2200097Ia 4500 170517s9999 xx 000 0 und d Crash Course: Biology And thus begins the most revolutionary biology course in history. Come and learn about covalent, ionic, and hydrogen bonds. What about electron orbitals, the octet rule, and what does it all have to do with a mad man named... Science. http://topdocumentaryfilms.com/crash-course-biology/ 334171 334171 0 0 0 CL CL 2017-05-17 0 2017-05-17 00:00:00 2017-05-17 DF