John Hopkins' notions on political economy

*Art. in De Gids		1840	comments on work
*Art. in De Recensent		1840	comments on work
Jan Hopkens : gewigtige waarheden in den vorm van vertelselen		1840	is translation of
*Art. in Vaderlandsche Letteroefeningen		1841	comments on work
*Mention in art. in De Gids		1841	None