This document contains references from various papers and books on topics related to user modeling, information retrieval, recommender systems, and machine learning. Specifically, it lists over 30 references used in research on statistical machine learning, collaborative filtering algorithms, information needs modeling, language modeling, text clustering, and other areas related to adaptive information access and recommendation. The references are from a variety of published sources including conference proceedings, journals, books, and theses spanning the years 1979-2003.