[Karty pochtovykh soobshchenīĭ uchrezhdennykh v Rossīĭskoĭ Imperīi pri T︠S︡ari︠e︡ Aleksi︠e︡i︠e︡ Mikhailovichi︠e︡ i ego preemnikakh do Ekateriny II].

Shows designated national postal routes established in various imperial reigns.
In Russian.
Common title devised by cataloger on the basis of the individual sheet titles.
Accompanied by printed text sheet in script (mostly indecipherable).
Available also through the Library of Congress Web site as a raster image.
Some sheets include note.