27:01 duration 27 minutes 1 second
NR.110.203 - Module 6: Physical and Chemical…
NR.110.203 - Module 6: Physical and Chemical Control of Microbes
29:43 duration 29 minutes 43 seconds
NR.110. 203 - Module 7: Microbe - Human…
NR.110. 203 - Module 7: Microbe - Human Interactions