American fern journal - American Fern Society. (American Fern Society, 1955)

American fern journal - American Fern Society. (American Fern Society, 1957)

American fern journal - American Fern Society. (American Fern Society, 1956)

American fern journal - American Fern Society. (American Fern Society, 1958)

American fern journal - American Fern Society. (American Fern Society, 1961)

American fern journal - American Fern Society. (American Fern Society, 1960)

American fern journal - American Fern Society. (American Fern Society, 1962)

American fern journal - American Fern Society. (American Fern Society, 1966)

American fern journal - American Fern Society. (American Fern Society, 1968)

American fern journal - American Fern Society. (American Fern Society, 1971)

American fern journal - American Fern Society. (American Fern Society, 1970)

American fern journal - American Fern Society. (American Fern Society, 1975)

American fern journal - American Fern Society. (American Fern Society, 1976)

American fern journal - American Fern Society. (American Fern Society, 1978)

American fern journal - American Fern Society. (American Fern Society, 1981)

American fern journal - American Fern Society. (American Fern Society, 1982)

American fern journal - American Fern Society. (American Fern Society, 1983)

American fern journal - American Fern Society. (American Fern Society, 1984)

American fern journal - American Fern Society. (American Fern Society, 1985)

American fern journal - American Fern Society. (American Fern Society, 1989)

American fern journal - American Fern Society. (American Fern Society, 1993)

American fern journal - American Fern Society. (American Fern Society, 1994)

American fern journal - American Fern Society. (American Fern Society, 1995)

American fern journal - American Fern Society. (American Fern Society, 1998)

American fern journal - American Fern Society. (American Fern Society, 1997)

American fern journal - American Fern Society. (American Fern Society, 2001)

American fern journal - American Fern Society. (American Fern Society, 2002)

American fern journal - American Fern Society. (American Fern Society, 2004)

American fern journal - American Fern Society. (American Fern Society, 2006)

American fern journal - American Fern Society. (American Fern Society, 2007)

American fern journal - American Fern Society. (American Fern Society, 2012)

American fern journal - American Fern Society. (American Fern Society, 2014)

American fern journal - American Fern Society. (American Fern Society, 2017)

American fern journal - American Fern Society. (American Fern Society, 2019)