New York Projectile Points Typology

This link to the New York State Museum website provides typology information based on William A. Ritchie’s "Typology and Nomenclature for New York Projectile Points" (1961, revised 1971) with subsequent revisions by Jonathon C. Lothrop. There are also supplementary pictures from the collections of museum.
http://collections.nysm.nysed.gov/projectilepoints/