Special thanks to Ermanno
Barchesi, Preston Cook, Ralf Engelmann, Rudolf
Hillebrand, Peter Jonkman, Pedro Oliveira, Ian D.C.
Shephard, Frederick C. Sherfy, Osamu Togo and Derek J.
White, for their information and images, widely used
in both Spotmatic magazine and this website. Header
logo kindly made for AOHC by Peter