Need help finding updated version of Horizon

[Lori McCall <w8n4surf@SBCGLOBAL.NET>]

Hi all!  I'm weeding my collection, and I've come across a series called Horizon 
that was put out by American Heritage Publishing in the 60's and 70's at the very 
least.  The texts have no ISBN or LCCN and look like very slim encyclopedias.  
Apparently they are actually compilations of articles and such from a Horizon 
magazine because it says it's listed in the Reader's Guide to Periodical Lit.

Does anyone know anything about this resource and whether it's still available (and 
current.)

Thanks for your help!
Lori

Lori McCall, Media Specialist
North Atlanta High School
lmccall@atlanta.k12.ga.us

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