Bibliography (13):

1. The Origin of Money Chain Letters

2. https://carryiton.net/chain-letter/archive/ae1917-06-05p1_Conscientious-Objectors.htm

3. https://carryiton.net/chain-letter/archive/ae1920-02-21p1_SinnFein_q4.htm

4. https://carryiton.net/chain-letter/archive/je1935_lucy-bowels.htm

5. https://carryiton.net/chain-letter/archive/ae1937-04-25p1_odd-invitation_q2.htm

6. 1986-chainletters-proctorandgamblesatanismhoax-ae1986-09_proctor_image.jpg

7. https://carryiton.net/chain-letter/archive/%21content.html

8. https://carryiton.net/chain-letter/bibliography.htm

9. https://carryiton.net/chain-letter/glossary.htm

10. Wikipedia Bibliography:

    1. https://en.wikipedia.org/wiki/Chain_letter  :

       https://en.wikipedia.org/wiki/Chain_letter

    2. https://en.wikipedia.org/wiki/Sinn_F%C3%A9in  :

       https://en.wikipedia.org/wiki/Sinn_F%C3%A9in

    3. https://en.wikipedia.org/wiki/Procter_%26_Gamble  :

       https://en.wikipedia.org/wiki/Procter_%26_Gamble

    4. https://en.wikipedia.org/wiki/Satanism  :

       https://en.wikipedia.org/wiki/Satanism