Media type: E-Article Title: Number Conservation: The Roles of Reversibility, Addition-Subtraction, and Misleading Perceptual Cues Contributor: Wallach, Lise; Wall, A. Jack; Anderson, Lorna imprint: JSTOR, 1967 Published in: Child Development Language: Not determined DOI: 10.2307/1127300 ISSN: 0009-3920 Keywords: Developmental and Educational Psychology ; Education ; Pediatrics, Perinatology and Child Health Origination: Footnote: