1. Andrews HN, Jr 1947 Ancient plants and the world they lived in. Comstock, Ithaca, 279 pp
2. Andrews HN, Jr 1961 Studies in paleobotany. Wiley, New York, 487 pp
3. Andrews HN 1974 Paleobotany 1947–1972. Ann Miss Bot Gard 61:179–202
4. Arnold CA 1930 The genus Callixylon from the Upper Devonian of central and western New York. MI Acad Sci Arts Lett 11:1–50
5. Arnold CA 1947 An introduction to paleobotany. McGraw-Hill, New York, 433 pp