Index to Bulletin 72, Correlation of Great Basin stratigraphic units, by John Elliot Allen, no date.

A brief introduction and four indexes: 1) alphabetical; 2) geologic epochs; 3) lithologic names by rock type and unit; and 4) lithologic names by groups, members, sequences, series, and tongues.

Published as a supplement to B72.

Bulletin 72A, 19 pages, 11x8.5", $3.00