This guide is designed as an introduction to basic bibliographies, journals, and reference works on topics in history of science and technology. Because the field of history of science and technology overlaps with other disciplines, ranging from history to science and technology studies, and investigates scientific fields as varied as biology and physics, geology and mathematics, the extent of relevant secondary sources is large. This guide, which concentrates on English-language sources available in UW-Madison Libraries, is meant only as a preliminary guide.