[A little-known means of psychological warfare: dropping leaflets from the air].
M
M
Spivak
D001957:Broadsides as Topic / Q000266:history; D005060:Europe / Q000208:ethnology; D049673:History, 20th Century; D006801:Humans; D011406:Propaganda; D011583:Psychological Warfare / Q000266:history; D044469:Racial Groups / Q000193:education / Q000208:ethnology / Q000266:history / Q000331:legislation & jurisprudence / Q000523:psychology; D014481:United States / Q000208:ethnology; D047828:World War I; D047789:World War II