1. A biologically defined exposure scale for the comparative description of rocky shores;Ballantine W. J.;Fid Stud.,1961
2. The birds of the parish of Dale, including Skokholm.;Barrett J. H.;Fid Stud.,1959
3. On some varieties of Thais lapillus in the Mount Desert region. A study of individual ecology.;Colton H. S.;Proc. Acad. nat. Sci. Philad.,1916
4. Variation in the Dog Whelk, Thais (Purpura Auct.) Lapillus
5. The distribution of dominant animals in relation to exposure on Skokholm shores.;Cremer G. A.;Rep. Skokholm Bird Obs.,1966