''Index Filicum'' volumes
*''Index Filicum, sive Enumeratio Omnium Generum Specierumque Filicum et Hydropteridum, ab Anno 1753 ad Finem Anni 1905, Descriptorum adjectis Synonymis Principalibus, Area Geographica, etc.''. by Christensen, Carl Frederik Albert. Hafniae apud H. Hagerup. 1906. lx/744/(2) pp., hardcover. *''Supplement I: Index Filicum, Supplementum (I) 1906-1912''. by Christensen, Carl Frederik Albert. Hafniae apud H. Hagerup. 1913. vi/132 pp, hardcover. *''Supplement II: Index Filicum, Supplementum Preliminaire (II), pour les Annees 1913, 1914, 1915, 1916''. by Christensen, Carl Frederik Albert. S. A. I Le Prince Bonaparte, Hafniae. 1917. iv/60 pp, hardcover. *''Supplement III: Index Filicum, Supplementum Tertium, pro Annis 1917-1933''. by Christensen, Carl Frederik Albert. apud H. Hagerup. 1934. 220 pp, hardcover. *''Supplement IV: Index Filicum, Supplementum Quartum, pro Annis 1934-1960''. by Pichi-Sermolli, Rudolfo E. G. International Bureau for Plant Taxonomy and Nomenclature, Utrecht, Netherlands. 1965. vi/370 pp, softcover. *''Supplement V: Index Filicum, Supplementum Quintum pro Annis 1961-1975''. by Jarrett, F. M., with collab. of T. A. Bence et al. Clarendon Press, Oxford. 1985. 400 pp, hardcover. ; B 84–29402. *''Supplement VI: Index Filicum: Supplementum Sextum upplement 6pro annis 1976-1990''. by Johns, R. J. Royal Botanic Gardens, Kew, UK. 1996. 414pp, softcover. . *''Supplement VII: Index Filicum: Supplementum Septimum upplement 7Pro Annis 1991-1995''. by Johns, R. J., P. J. Edwards, R. Davies and K. Challis. Royal Botanic Gardens, Kew, UK. 1997. 124pp, softcover. .Other Relevant Indices
*Grimes, J. W., and B. S. Parris. ''Index of Thelypteridaceae''. Kew Publishing, Kew Royal Botanical Garden, United Kingdom. 1986. 54pp, PB. . *Herter, W. G. ''Index Lycopodiorum.'' W. G. Herter, Basel. 1949. *Øllgaard, Benjamin. ''Index of the Lycopodiaceae.'' Kongel. Danske Vidensk. Selsk., Biol. Skr. 34. Copenhagen. 1989. . *Reed, Clyde F. ''Index to Equisetophyta.'' Reed Herbarium, Baltimore, MD. 1971. *Reed, Clyde F. ''Index Selaginellarum''. Memorias da Sociedade Broteriana. 1966. *Reed, Clyde F. ''Index Isoetales''. Boletim da Sociedade Broteriana. 1953. *Reed, Clyde F. ''Index Psilotales''. Boletim da Sociedade Broteriana, Vol. XL. 30/2 pp., PB. 1966.References
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