London, Routledge & Kegan Paul, (1966). 8vo. Publishers cloth with dust jacket. XIII,250 pp. A fine and clean copy.
First edition. ""International Library of Philosophy and Scientific Method"".
New York, Dover, (1959). 8vo. Orig. printed wrappers. VIII,301,(14) pp.
Dover Publications Inc 1959 in8. 1959. Broché.
Bon état cependant écorchure sur le haut du premier plat intérieur propre bonne tenue