While looking around to search for additional information about the early professional basketball leagues before the start of the NBA, i came across this site:
http://probasketballencyclopedia.com. For me it was an unknown one, which has a lot of very detailed information about the ABL, including teamrosters, facts and biographies. I think people might be interested to check this site out. It contains a lot of useful and unknown information! Does anyone happens to know who the administrators of that site might be?