实践一次提高一步 Shijian yici tigao yibu Designer Wang Shuanggui (王双贵) Date 1973, July Publisher Tianjin renmin meishu chubanshe (天津人民美术出版社) Size 53x77 cm. Call nr. BG E15/929 Collection Landsberger collection Theme People's Liberation Army Air Force (PLAAF)
