IAPS Reference

[Larry McDavid]

While maintaining the NASS Sundial Registry recently, I found the 
following identified as a reference in the listing for a dial located in 
Houston, Texas: "Ref: IAPS Listing, May 95"

This reference is unfamiliar to me and to several others I have asked. 
Does anyone here recognize it? If you do, please explain.

Larry McDavid
Sundial Registrar
North American Sundial Society

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