01:09:50duration 1 hour 9 minutes
PHYEPS30_Lecture 2(second part) Lecture 3(first…
PHYEPS30_Lecture 2(second part) Lecture 3(first part)
01:16:53duration 1 hour 16 minutes
PHYEPS30 Lecture 1 (2nd part) Lecture 2 (1st part)