TY  - BOOK
AU  - Piéraut-Le Bonniec,Gilberte
TI  - Le raisonnement modal: étude génétique 
T2  - Connaissance et langage
U1  - 160 
PY  - 1974///
CY  - Paris
PB  - Mouton
KW  - Modality (Logic)
KW  - Modality (Theory of knowledge)
KW  - Modalidad (Lógica)
N1  - Rev. translation published (1980) in English under title: The development of modal reasoning; Includes indexes; Bibliography: p. [265]-271
ER  -