Also available online in PDF format from the U.S. Geological Survey Warehouse (http://pubs.er.usgs.gov/).
Supplements Index of generic names of fossil plants, 1820-1965, by H. N. Andrews and Index of generic names of fossil plants, 1966-1973, by A. M. Blazer.
Summary
Based on the Compendium index of paleobotany of the U.S. Geological Survey.