Lincoln Doubled Ears Question

Hey everyone , I have this chart I use to check for Doubled Ear coins . For the life of me, I can't remember where I got it .
Does anyone know of a good site for these Errors ?
Here's what I have :

 

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Variety Vista i forget the others wow im only 16 and it seems I can't remember a single thing.

 

Ok thanks friend ! I have that saved too.
When I start wrapping the Cat for Xmas then I'll worry.

 

Darn @potty dollar 1878 . That's not it , that's all DDO's .

 

Lol.. Wait until you get to 50 plus lad...

Hehehehe... Cat would love it, treat it as a game of hide and seek......

 

Here's a more comprehensive one by the same author. I feel that they are only available through being in one of the Fb groups he is part of

 

At least I can use the " I have Post-Lymes syndrome " card .

 

Hey @Lueds ! Thanks man, I'll put it through good use .