1
by Helvétius
Published 1773
chez la Société Typographique

2
by Helvétius
Published 1773
chez la Société Typographique

3
by Helvétius
Published 1786

4
by Helvétius
Published 1777
printed for B. Law, Ave-Maria-Lane; and G. Robinson, Pater-Noster-Row