昭和二十年の靑空
Subtitle: Yokohama no kūshū, soshite senryō no machi
By: Akatsuka Yukio
Publisher: Yūrindō
Published: 2004
Place of publication: Yokoyama-shi
Language: jpn
Number of pages: 224
Subjects: World War, 1939-1945; Aerial Bombing; History
Other titles: Shōwa nijūnen no aozora; Shōwa 20-nen no aozora :