Olšina, Ladislav [Olsina, Ladislav]

Extended arch types on the fifth design 25h Hradčany. Jul/Aug/2007, p. 7; Sep/Oct/2007, p. 3.

New printing plate combinations found. Fall/2011, p. 5.

Ondrášek, Hynek [Ondrasek, Hynek]

Exhibition newspaper souvenir sheet Bratislava 37. Dec/1977, p. 154.

Postal history of the Hlučín District. Jan/Feb/2000, p. 31.

Two types of the commemorative souvenir sheet of 1938. May/1977, p. 65.

Orna, Bernard

Jiří Švengsbir - Czech engraver. Oct/1963, p. 120.

Osbourn, C. Hedley

1920-26 allegorical issues. Jan/1963, p. 7; Apr/1962, p. 51; May/1962, p. 67; Jun/1962, p. 83; Oct/1962, p. 115; Nov/1962, p. 131; Dec/1962, p. 147.

Czechoslovak postmarks of Austrian and Hungarian origin. May/1944, p. 2.

Question of presenting material... Apr/1956, p. 54.

Religious thought and philosophy as depicted on the stamps of Czechoslovakia. Feb/1964, p. 24; Apr/1963, p. 52; Apr/1963, p. 53; Jun/1963, p. 90; Jun/1963, p. 92; Jun/1964, p. 96; Oct/1962, p. 119; Nov/1963, p. 140; Nov/1965, p. 156; Dec/1979, p. 174.

- As Translator

Handbook of Czechoslovakian postmarks of Austrian and Hungarian origin. Jan/1972, p. 7; Feb/1972, p. 21; Mar/1972, p. 39; Apr/1972, p. 53; May/1970, p. 69; Sep/1971, p. 71; May/1972, p. 71; Jun/1970, p. 87; Oct/1971, p. 89; Nov/1971, p. 103; Dec/1971, p. 119; Nov/1970, p. 135.

Osthues, Wilfried

Czechoslovak Entires, 1918-32; Specialized Catalog. May/Jun/1995, p. 16.

Ott, G. Sherman

Bohemia and Moravia become a Protectorate of Germany. Feb/1972, p. 19.