TY  - BOOK
AU  - Pieraut-Le Bonniec,Gilberte
TI  - The development of modal reasoning: genesis of necessity and possibility notions 
SN  - 0125546505
PY  - 1980///
CY  - New York
PB  - Academic Press
KW  - Reasoning in children
KW  - Modality (Logic)
N1  - Revised translation of 1974 ed. published under title : Le raisonnement modal; Includes index; Bibliography : p. 157-165
ER  -