1
by Helvétius
Published 1758
Chez Durand

2
by Helvétius
Published 1769
Chez Durand

3
by Helvétius
Published 1759
[Printed for the translator, and sold by Mr. Dodsley and Co. [and 8 others]

4
by Helvétius
Published 1768
Chez Durand