TY  - BOOK
TI  - Rules for the direction of the mind / 
PY  - 1952///
CY  - Chicago : 
PB  - Encyclopaedia Britannica, 
N1  - Contiene además: Discourse of the Method. Meditations on First Philosophy. Objections against Meditations and replies. The geometry / René Descartes.-- Etichs / Benedict de Spinoza
ER  -