Ibbotson, Peter

Current philatelic literature [Title varies]. Dec/1980, p. 36.

Indra, Viktor J

Postal evolution in the Hlučín region from prestamp era to 1973. Mar/1999, p. 10; Jun/1999, p. 33; Sep/1999, p. 58; Dec/1999, p. 99.

Irra, Miroslav

Czechoslovak air force 1945-1957. Mar/2007, p. 6.

Irvine, D E G

Errors in Czechoslovakian stamp designs. Jun/1993, p. 40.