Incoming Resources
- Mexico, a higher vision, an aerial journey from past to present, Carlos Fuentes, introduction ; Michael Calderwood, aerial photography ; Michael Calderwood, Gabriel Breña, text
- Mesoamerica's ancient cities, aerial views of precolumbian ruins in Mexico, Guatemala, Belize, and Honduras, William M. Ferguson and Arthur H. Rohn ; photographs by John Q. Royce and William M. Ferguson ; foreword by R.E.W. Adams