Dexter Simmons

Engineer
Known to have worked for [l283415]

https://books.google.com/books?id=XQ0EAAAAMBAJ&pg=PA63&lpg=PA63&dq=where+were+Columbia+Records+mastering+suites&source=bl&ots=3nwDNqTCuC&sig=zymITwsgi0yllGN80XTKlQeKSRc&hl=en&sa=X&ei=B1CEVcGbG4ueyQTdy4O4Dg&ved=0CCYQ6AEwAQ#v=onepage&q=where%20were%20Columbia%20Records%20mastering%20suites&f=false