NV1-8:
Charley's corner. Jan/1976, p.13.
SO1-23:
60 haleřu stamp overprinted SO 1920, comb perforated 13 3/4x13 1/2. Oct/1972, p.115.
Charley's corner. Feb/1976, p.30; Mar/1976, p.44.
Czech expert speaks. May/Jun/2000, p.28.
Objects of interest on Czechoslovak stamps. Mar/1972, p.43.
President's corner. Jul/Aug/1991, p.16.
S O 1920 overprints on Czech Hradčany stamps. Apr/1966, p.65; May/1966, p.85.
SO5:
Czech expert speaks. May/Jun/2000, p.28.
SO14:
60 haleřu stamp overprinted SO 1920, comb perforated 13 3/4x13 1/2. Oct/1972, p.115.
SO28-32:
Charley's corner. Jan/1976, p.13.