Astrophysics Data System (ADS)Query Results from Astronomy DatabaseQuery Parameters:Title words: HEAO2 or (HEAO and 2) or HEAO-2 Query words: HEAO2 or (HEAO and 2) or HEAO-2 Start date: 00/1970 End date: 12/1997 Title Query Settings: Boolean Logic: ON Abstract Text Query Settings: Boolean Logic: ON |