Thank you very much!It helped me a lot!
I do not know how good this information, but if there had been more than one event(AAA big car) in 22th July.Is it true?
A total of nine events were until 1949.Are these such a good summary do you have?
all the sanctioned events from the past at Selinsgrove can be found here http://selinsgrovespeedway.com/winlistsanctioned.html
most have dates of the event listed. as far as i and another speedway historian can tell this is all of the events. we've done very exhaustive research.
i do not have any records for williams grove.
if you're strictly looking for AAA events WG probably had them near the same dates as selinsgrove(just a guess) Selinsgrove's dates were
7/20/1946 won by Bill Holland
7/26/1947 won by Joie Chitwood
7/25/1948 won by Tommy Hinnershitz
the only other groups to run there in the 40's were Penn-Jersey 6 events from 1946-1949 and the Central States Racing Association 1 event in 1949. those winners can also be found at the link above.