On sale date from Blackhawk #194.
Bob Klein, Gene Reed, Bob Hughes, and Mike Tiefenbacher credit pencils to Dick Dillin. Craig Delich and Pat Lang credit pencils to Jim Mooney.
Letters credit from Todd Klein via his Klein Letters blog (18 September 2016, http://kleinletters.com/Blog/ira-schnapp-in-worlds-finest-comics-part-1/).
last solo Green Arrow story until Green Lantern 87. Writer Credit by Martin O'Hearn.
The final panel lists some ways you can share with senior citizens.