Krassen, Miles. Appalachian Fiddle. NY: Oak Publications, 1973.
Krassen, Miles. Clawhammer Banjo. NY: Oak Publications, 1974. (Companion to Krassen's Fiddle book.)
Muller, Eric & Koehler, Barbara. Frailing the 5-String Banjo. Pacific, MO: Mel Bay Publications, 1973.
Perlman, Ken. Melodic Clawhammer Banjo. NY: Oak Publications, 1979.
Perlman, Ken. Clawhammer Style Banjo. Englewood Cliffs, NJ: Prentice-Hall, 1983.
Rosenbaum, Art. Old-Time Mountain Banjo. NY: Oak Publications, 1968.
Rosenbaum, Art. The Art of the Mountain Banjo. Fullerton, CA: Centerstream, 1981
Seeger, Peggy. The 5-String Banjo, American Folk Styles. NY: Bargail Music Press, 1960.
Seeger, Pete. How to Play the 5-String Banjo. Third Edition Rev. Beacon, NY: Pete Seeger, 1962. (N.B. The first, mimeographed edition of this manual was published in 1948. A 2nd edition followed in 1954. A 3rd in 1961. Then the 1962 revision. I myself have seen none of the earlier editions, but understand that there are significant differences.)
Slater, Alec. Clawhammer Banjo Solos on Modal Music & in the Irish Tradition. Pacific, MO: Mel Bay Publications, 1979.