1. Grothendieck Topologies;Artin;Harvard Univ. Notes,1962
2. Whitney numbers of geometric lattices;Baclawski;Advances in Math.,1975
3. Homology and Combinatorics of Ordered Sets;Baclawski,1976
4. K. Baclawski, Cohen-Macaulay ordered sets, in preparation.
5. Lattice Theory;Birkhoff,1967