المؤلفون: Lakosil, Jan, 1981- author.

مصطلحات موضوعية: Border security -- Czech Republic -- Šumava -- Pictorial works., World War, 1939-1945 -- Czech Republic -- Šumava -- Pictorial works., Cold War.

جغرافية الموضوع: Czechoslovakia -- Defenses -- History -- 20th century -- Pictorial works., Šumava (Czech Republic) -- Pictorial works., Czechoslovakia -- History -- 1938-1945 -- Sources., Czechoslovakia -- History -- 1945-1992 -- Sources.

المؤلفون: Trojan, Emil.

مصطلحات موضوعية: Fortification -- Czechoslovakia -- History -- 20th century -- Pictorial works.

جغرافية الموضوع: Czechoslovakia -- History, Military -- 20th century -- Pictorial works., Czechoslovakia -- Defenses -- History -- 20th century -- Pictorial works.