Don Machholz

Guía de observatión del maratón Messier

2003

The Observing Guide to the Messier Marathon

2002

An observer's guide to comet H

An observer's guide to comet Hale-Bopp: Making the most of Comet Hale-Bopp

1996

Messier marathon observer's gu

Messier marathon observer's guide

1994

A decade of comets

A decade of comets

1985