Girls und Panzer: Katyusha (Full)/ ガールズ＆パンツァー　カチューシャ

Niconico Video Link: The full version of Katyusha, as sung by Umesaka Sumire (Nonna) and Kanemoto Hisako (Katyusha). The incomplete version was sung during episode 8, which sadly was cut out of the Crunchyroll broadcast of the same episode. The complete version that can be found here came out with the release of the first disc of the Girls und Panzer OST.