Scale approximately 1:38,000 (W 97°32ʹ44ʺ--W 97°24ʹ35ʺ/N 32°40ʹ29ʺ--N 32°33ʹ49ʺ).
Note:
Depths shown by isolines; underwater relief shown by rock drawings. Includes "Vicinity map", mileage table, notes, and facilities table. Text and color illustrations on verso. "U.S. Government Printing Office: 1976 672-688."