References

1. EBAY Magazine Grading Scale: https://www.ebay.com/pages/help/sell/contextual/condition_6.html
2. How to Grade Magazines for Sale, Bears Value Magazine Grading Scale: Click here to view
3. Playboy Price Guide: Downtown Magazine: http://www.dtmagazine.com/cmopg1924/pb1.html
4. Ken Ritchie Collectables, Memphis, TN: http://www.pbmags.com/backissues.htm
5. Magazines Shop Online (Now shut down): Click here to view
6. Jack Bramble,”6th Edition The Playboy Collectors Guide & Price List,” Budget Enterprises, PO Box 592 Snowden Station, Montreal, Canada, H3X 3T7, 1984.
7. Playboy Index: http://www.philsp.com/mags/playboy.html
8. Playboy Digital Archive: http://join.iplayboy.com/signup/signup.php?nats=MC4wLjEwMzUuMTE1OS4wLjAuMC4wLjA&step=2