The General Aviation Historical Association (GAHA) is not in Wellsville, Pennsylvania. It's headquartered in Wichita, Kansas—the "Air Capital of the World."
General Aviation Historical Association
Wichita, Kansas
(Often associated with the Kansas Aviation Museum at 3350 S. George Washington Blvd, Wichita, KS 67210)
Wichita earned its aviation title honestly:
Wellsville (Allegany County, NY — not PA) has the Wellsville Municipal Airport (ELZ), but no major aviation historical organization. Pennsylvania's aviation history centers on:
If you're researching general aviation history, Wichita is the destination. The GAHA archives, Kansas Aviation Museum, and surrounding aviation industry make it the logical center.