Great Western Observer (GWO)
GWO is the publication of the Western Alliance Conferences (WAC), serving all four western region planetarium organizations:
PPA (Pacific Planetarium Association),
RMPA (Rocky Mountain Planetarium Association),
GPPA (Great Plains Planetarium Association) and
SWAP (Southwest Association of Planetariums).
Image of M16, by G. Reagan HOU TRA,
Tzec Maun Observatory, 2009.
PPA Conference Proceedings
There is a PPA Google Group (electronic mailing list) - groups.google.com/g/ppa-email.