http://groups.yahoo.com/group/GeodesicObservatories
> 
> http://groups.yahoo.com/group/ObservatoryDomes
> 
> http://groups.yahoo.com/group/Observatories
> 
> http://groups.yahoo.com/group/Observatory_RoofandDome_Automation
> 
> http://groups.yahoo.com/group/RoboticObservatory
> 
> http://groups.yahoo.com/group/Roll_Off_Roof
> 
> http://groups.yahoo.com/group/skyshed