敌机投弹方法 Diji toudan fangfa Designer Designer unknown (未知) Date ca. 1971 Publisher Beijingshi renmin fangkong zhihuibu (北京市人民防空指挥部) Size 53x76 cm. Call nr. BG E35/674 Collection IISH collection Theme After the Attack (1971) People's air defense common knowledge wall charts (ca. 1971)
