American fern journal - American Fern Society. (American Fern Society, 1942)

American fern journal - American Fern Society. (American Fern Society, 1943)

American fern journal - American Fern Society. (American Fern Society, 1944)

American fern journal - American Fern Society. (American Fern Society, 1945)

American fern journal - American Fern Society. (American Fern Society, 1946)

American fern journal - American Fern Society. (American Fern Society, 1949)

American fern journal - American Fern Society. (American Fern Society, 1948)

American fern journal - American Fern Society. (American Fern Society, 1951)

American fern journal - American Fern Society. (American Fern Society, 1952)

American fern journal - American Fern Society. (American Fern Society, 1953)

American fern journal - American Fern Society. (American Fern Society, 1954)

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, 1959)

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

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

American fern journal - American Fern Society. (American Fern Society, 1963)

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

American fern journal - American Fern Society. (American Fern Society, 1965)

American fern journal - American Fern Society. (American Fern Society, 1964)

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

American fern journal - American Fern Society. (American Fern Society, 1967)

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

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

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

American fern journal - American Fern Society. (American Fern Society, 1972)

American fern journal - American Fern Society. (American Fern Society, 1974)

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, 1980)

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, 1984)

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

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

American fern journal - American Fern Society. (American Fern Society, 1987)

American fern journal - American Fern Society. (American Fern Society, 1990)

American fern journal - American Fern Society. (American Fern Society, 1992)

American fern journal - American Fern Society. (American Fern Society, 1991)

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

American fern journal - American Fern Society. (American Fern Society, 1996)

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, 1999)