Billboard  Buyer's Guide 1971-72 
Billboard 1971-09-18 Buyer's-Guide
 
Apple Records (pages 11-20) 
Billboard 1971-09-18 Buyer's-Guide p11
Billboard 1971-09-18 Buyer's-Guide p20
 
 
 
 [Magazine] Billboard Buyer's Guide 1969-70 (Aug 30, 1969) 
 
 [Magazine] Billboard Buyer's Guide 1970-71 (Sep 12, 1970) 
 
 [Magazine] Billboard Buyer's Guide 1972-73 (Oct 7, 1972)