Pärmin pirut
Subtitle: Er. P. 21:n vailheita jatkosodassa 1941-1942
By: Topi Vaara.
Publisher: Otava
Published: 1977
Place of publication: Helsinki
Language: fin
Number of pages: 218
Subjects: Finland. Maavoimat. Erillispataljoona 21.; World War, 1939-1945 -- Regimental histories -- Finland.; World War, 1939-1945 -- Finland.; Finland -- History -- 1939-1945.