Determining that one particular topic is the best location for an article or essay devoted to an artist is a subjective exercise. During a lifetime, an artist may produce significant work on several topics. Experts argue about whether the artist's earlier, mid-career or later work -- or devotion to one particular subject over another -- is the most significant. Resource Library articles and essays devoted exclusively to individual artists known for their devotion to a topic included in this catalogue may, for various reasons, not be listed within a topic. If they are deceased artists, a proven way to access biographical information is TFAO's America's Distinguished Artists , a catalogue companion to Topics in American Art .