This study was made possible through the cooperation of many librarians. I would especially like to thank Miss Katherine Prescott and her staff at the Carnegie West Branch Library, Tree Public Library, Cleveland, Chio and Hiss Janet Stevena and her staff at the Pennsylvania Aveue Branch Library, Enoch Pratt Free Library, Baltiaore, Maryland. I would also like to thank the Clereland Public Library and the Enoch Pratt Free Library for permision to pursue the heart of this study in their libraries. The cooperation of the public libraries of Elizbeth, Jersey City, Paterson and Trenton in New Jersey and of Brooklyn, the Bronx, and Queens Borough in New York is appreciated. I am indebted to Dr. Ralph 6. Shaw and Dr. Theodore C, Hiues who, from the concept of this project to its completion, have given me special assistance and guidance. Finally, ay deepest gratitude goes to Dr. Margaret E. Monroe both for my first insights into the field of library eerrlee and also for her unflagging Inspiration and sound counsel throughout this project.