Few exile stamps catalogs must have such an honest name as this one: Latvian non-postal exile stamps is exactly what it shows. The Romanian and especially the Croatian exile communities tried to establish some sort of legality by producing stamps which were supposed to be somehow official. The stamps shown in this catalog are propaganda labels and although they look like stamps, they were definitely never postally used (except for usage next to real stamps on envelopes).
Of course the more specialized stamp collector knows this already, but when you start to collect stamps you very soon run into stamps which are difficult to categorize. They don’t show up in any standard catalog and so they pretty soon end up in the back of a stamp album. That is a shame, because quite often these stamps tell a by far more interesting story than “regular” stamps.
In 1979 the Latvian Philatelic Society produced a booklet, Xeroxed at A5 without color, which showed most of the propaganda labels produced by Latvians living outside of the Eastern Bloc nations. The catalog shows the diaspora quite nicely: the catalog lists most stamps by country in which they were produced. So, there are listings for nations like the UK, Germany and Sweden, and of course Canada and the US.
Besides showing the stamps themselves a lot of information is given about who produced the stamps, in what quantities they were produced (giving an indication of their relative scarcity) and what they show.
Unfortunately this catalog has exactly the same problem as the Croatian exile stamp catalog: it is not just propaganda, it is propaganda of a political specter people generally don’t want to be seen with. (Let me state that I am politically not involved in any of these groups!) That means that the communist takeover of the Baltic states is portrayed as a plague coming over those states (which is of course true, the communist takeover was a major humanitarian disaster), but at the same time nothing is being mentioned about the thousands of people killed by the Baltic states armies (aided by the Nazi’s) during the Second World War. Atrocities were committed on all sides, but you will only hear about the atrocities committed by the communists. That is understandable in 1979 (or maybe not actually), but it is very definitely not understandable in 2005 when a stamp was produced showing Kurland as being a last defense against communism in 19944/45, like the defenders where angels or something like that. Let there be no misunderstanding about this: they were not just patriots, they were also collaborators of the Nazi’s!