1. Ecological studies in the Mammoth Cave system of Kentucky. I. The biota;Barr;Int. J. Speleol.,1967
2. Cave ecology and the evolution of troglobites;Barr;Evol. Biol.,1968
3. The taxonomy, distribution, and affinities of Neaphaenops with notes on associated species of Pseudoanophtalmus (Coleoptera: Carabidae);Barr;Amer. Mus. Nov.,1979
4. Ecological studies in the Mammoth Cave ecosystem of Kentucky, II. The ecosystem;Barr;Ann. Speleol.,1971
5. The ecological genetics for four subspecies of Neaphaenops tellkampfii (Coleoptera: Carabidae);Brunner,1981