Link: Spectropop - Spector, Brill, Gold Star and Girl Groups.
How the heck have I managed to miss this astounding pop music resource - established back in 1997 and featuring an insane amount of info on all my favorite pop artists from the 60's - including the obscure stuff that no one I ever talk to has ever heard of . Brilliant and I'm thrilled to have found it - better late than never.