The case of privilege of the drop -master of the 14th grade of Heine on the chromatic pipe invented by him.N. 24/V;V.U.14/x.1835

The case of privilege of the drop -master of the 14th grade of Heine on the chromatic pipe invented by him.N. 24/V;V.U.14/x.1835 / Department of State Economy.- 1835. -19 l .. - (Department of state savings of the State Council. Inventory No. 2. 1835).-Film..I. Department of State Economy ..Electronic copy source: RGIAOriginal storage location: RGIA f.1152 op.2 1835 d.53