The address of the Squarenote developer is as follows:

SQN Inc.
60 East Chestnut St., #422
Chicago, IL  60611
email: [log in to unmask]
http://sqn.com/

Anita Cohen-Williams; Reference Services; Hayden Library
Arizona State University, Tempe, AZ  85287-1006
PHONE: (602) 965-4579              FAX: (602) 965-9169
[log in to unmask]  Owner: HISTARCH, SPANBORD, SUB-ARCH