Opisthobranch newsletter - Long, Steven J. (S.J. Long, 1969)

Opisthobranch newsletter - Long, Steven J. (S.J. Long, 1970)

Opisthobranch newsletter - Long, Steven J. (S.J. Long, 1977)

Opisthobranch newsletter - Long, Steven J. (S.J. Long, 1978)

Opisthobranch newsletter - Long, Steven J. (S.J. Long, 1979)

Opisthobranch newsletter - Long, Steven J. (S.J. Long, 1980)

Opisthobranch newsletter - Long, Steven J. (S.J. Long, 1981)