This wark is in the public domain acause it wis published in the Unitit States atween 1923 an 1977 inclusive, withoot a copyricht notice. Unless the author haes been deid for several years, it isna in the public domain in kintras that dinna apply the rule o the shorter term for US warks. This includes Canadae, Cheenae (nae Hong Kong, Macao, or Taiwan Area), Germany, Mexico, Swisserland, an ither kintras wi individual treaties. See further explanation an aa.
