This document discusses various types of biographical sources, including biographies, biographical dictionaries, and "Who's Who" type sources. Biographies aim to provide a full narrative account of a person's life that elucidates their character. Biographical dictionaries contain brief entries with critical dates and events for individuals. "Who's Who" sources also contain concise biographical information, with the oldest and best-known being the annual British publication Who's Who. The document outlines some prominent biographical dictionaries and online sources.