Catalogul timbrelor postale românesti 1938 - C.Nămoloiu, G. Nosca, Bucuresti, 117 pages. It contains a detailed listing of all the Romanian issues from 1858 to 1938, including the occupation stamp issues such as Cluj, Oradea, Debrecen, Timisoara, Pokutia. It gives color and perforation varieties and describes some errors.
România, catalog filatelic, 1946 - F. Konrad, Oradea, 59 pages. The "prohibited" stamps are not listed. It includes the 1919 Cluj and Oradea issues, the 1944-1945 "Local Issues" from Northern Transylvania (Odorhei, Oradea I & II, Năsăud, Sălaj, Sighet and Târgu Mures), the C.M.T. issues, the German, Austrian and Bulgarian occupation stamps used in Romania,
Catalog filatelic oficial al timbrelor Republicii Populare Române, 1954, Bucuresti, 111 pages. It provides detailed information only on the stamps issues between 1948-1953. FDCs, commemorative cancels and envelopes issued after 1948 are also listed.
Catalog filatelic al Republicii Populare Române, 1957, Bucuresti, 207 pages. Contain the stamps (on 74 pages), FDCs, commemorative cancels and envelopes issued between 1948-1956.
Catalogul mărcilor postale românesti, 1959, Bucuresti, 232 pages. It describes in detail all the stamps issued between 1858 and 1959, except the "prohibited" ones. It includes the 1919 overprinted issues (Cluj, Oradea, Timisoara, Banat Bacska), the Northern Transylvanian issues, foreign posts used in Romania, local (hotel) posts, etc.
Catalogul mărcilor postale românesti, 1964, Bucuresti, 355 pages. It includes the 1858 to 1964 issues and first day and commemorative cancels. Absent from the catalogue are the "prohibited" issues, all the Romanian stamps used abroad, foreign stamps used in Romania, local posts, etc.