There are two sources for the 1962 election: the oversized ledger, held by the Oklahoma State Archives in Oklahoma City, and the Election Results & Statistics publication. 1962 was the first year the State Election Board released a standard size publication of results.
Source for Popular Vote data: Oklahoma State Election Board, "For United States Senator," Official Returns of the United States Congress, General Election, November 6, 1962 (Oklahoma City, 1962)