With his permission, this article was extracted from classroom notes Carlitz wrote some forty to fifty years ago and shows that there is significance even in his unpublished research.
Sa kanyang pahintulot, ang article ay nakuha mula sa silid-aralan tala Carlitz wrote ilang apatnapu't sa pipti years ago at nagpapakita na may kabuluhan kahit sa kanyang mga pananaliksik na hindi inilathala.