00644nam a2200193I 4504 225361 720121|1929||||||| |||| ||eng|c Wright St Univ Lib NEDD BF721 .P5x Piaget, Jean, 1896-1980. The child's conception of the world. London, Routledge & K. Paul [1929] ix, 379 p. 23 cm. International library of psychology, philosophy, and scientific method. Child development. Tomlinson, Joan. Tomlinson, Andrew. International library of psychology, philosophy, and scientific method.