This bibliographic review aims to present a single comprehensive source of references to facilitate clinical application of data obtained on the vocal activity of normal infants and to facilitate continued research on prelinguistic vocal output. The bibliography cites the published observational, empirical, and theoretical reports that examine the normal infant's noncry vocalization. Over 300 citations are listed, from the late 1800's to 1987. Citations are restricted to those discussions in which some type of analysis was attempted or completed on infant subjects' actual noncry utterances, whether the analysis was articulatory, acoustic, linguistic, phonatory, descriptive, or behavioral. The bibliography emphasizes studies of normal vocal functioning, but also includes studies that first established a normal baseline against which to compare a selected risk population. Dissertations and presented papers are not included, and only selected chapters are drawn from full-length books on infant vocalization. (JDD)