ASG stands for Apistogramma Study Group, an excellent organization. Dues to join ASG are: for U.S. $17, Canada $19, and international $21.50. These rates are for 1 yr.
membership, ASG, P.O. Box 504, Elkhorn, WI 53121-0504
You can also visit the website http://user.mc.net~warewolf/apisto.html or contact the membership chairperson, Daryl Szyska at firstname.lastname@example.org
I hope I have all the information correct!!