- 16-PTP Seminar-Charles Downing-0224-WD-132
- 16-PTP Seminar-Charles Downing-0224-WD-130
- 16-PTP Seminar-Charles Downing-0224-WD-128
- 16-PTP Seminar-Charles Downing-0224-WD-127
- 16-PTP Seminar-Charles Downing-0224-WD-124
- 16-PTP Seminar-Charles Downing-0224-WD-113
- 16-PTP Seminar-Charles Downing-0224-WD-109
- 16-PTP Seminar-Charles Downing-0224-WD-100
- 16-PTP Seminar-Charles Downing-0224-WD-094
- 16-PTP Seminar-Charles Downing-0224-WD-085
- 16-PTP Seminar-Charles Downing-0224-WD-079
- 16-PTP Seminar-Charles Downing-0224-WD-074
- 16-PTP Seminar-Charles Downing-0224-WD-067
- 16-PTP Seminar-Charles Downing-0224-WD-035
- 16-PTP Seminar-Charles Downing-0224-WD-027
- 16-PTP Seminar-Charles Downing-0224-WD-015
- 16-PTP Seminar-Charles Downing-0224-WD-013
- 16-PTP Seminar-Charles Downing-0224-WD-001