25:51duration 25 minutes 51 seconds
GEB4935 HSA4938 - Lesson 14_ch 14
16:10duration 16 minutes 10 seconds
GEB4935 HSA4938 - Lesson 07_ch 5
19:48duration 19 minutes 48 seconds
GEB4935 HSA4938 - Lesson 06_ch 4
21:41duration 21 minutes 41 seconds
GEB4935 HSA4938 - Lesson 05_ch 3