Frontmatter -- Contents -- Introduction -- Why and How Do We Study the Sounds of Speech? -- Speech Recognition: A Model and a Program for Research -- On the Feature "Advanced Tongue Root" -- A Note on Laryngeal Features -- Theoretical Issues in Phonology in the 1970's -- Review of Peter Ladefoged, Preliminaries to Linguistic Phonetics -- Knowledge Unlearned and Untaught: What Speakers Know about the Sounds of their Language -- On Distinctive Features and their Articulatory Implementation -- Speculations about the Representations of Words in Memory -- On the Relationship of Phonology and Phonetics: Comments on B. Lindblom 'On the Origin and Purpose of Discreteness and Invariance in Sound Patterns' -- Why Phonology is Different -- Knowledge of Language and the Sounds of Speech -- Feature Geometry and Feature Spreading -- Name Index -- Language Index -- Subject Index