00453nam a2200085Ia 4500008004100000245002600041300023000067650001300297856005700310170517s9999    xx            000 0 und d  aCrash Course: Biology  aAnd 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...  xScience.  uhttp://topdocumentaryfilms.com/crash-course-biology/