These are tribute sites for stations where Bob Hagen worked and other radio resource sites.
WNEW Tribute Site:
Maintained by Edward M. Brown, son of WNEW newscaster Ed Brown.
WMCA Tribute Site:
Deals with the Top-40 era before Bob Arrived in 1970
Cleveland Radio Archives Project:
Histories of WHK, WERE and KYW.
New York Radio News - 1978
There's a picture of Bob in the WNEW Section
ReelRadio.com:
Recordings of the golden age of Top 40 radio, featuring segments from WHK, KYW, WCFL and WMCA..
Radio Timeline:
More recordings of the golden age of Top 40 radio.
440 Satisfaction
A "where are they now" service for radio
Big Apple Airchecks
Bob is mentioned on the In Memoriam page