After Colin Andrews and Pat Delgado went their separate ways in 1992, Colin set up Circles Phenomenon Research International and published his magazine from the USA until the late 1990s:
Volume 1
Introduction
Vol 1 #1 Jun 1992
Vol 1 #2 Sep 1992
Vol 1 #3 Winter 1993
Vol 1 #4 Spring 1993
Vol 2 #1 Summer 1993
Vol 2 #2 Fall 1993
Crop Circle Research Archive 