The highest approved rules for the use of colored lights on military postal, St. Petersburg yacht club and merchant ships to avo...

The highest approved rules for the use of colored lights on military postal, St. Petersburg yacht club and merchant ships to avoid clashes.February 28, 1853 - 1853. -7 l .. - (Caucasian committee. (1833-1882). Inventory No. 7).-Film..Electronic copy source: RGIAOriginal storage location: RGIA f.1268 op.7 d.90