What has the author Harwood Lawrence Childs written?

Harwood Lawrence Childs has written:

'Propaganda by short wave' -- subject(s): Propaganda, Radio broadcasting, Radio in propaganda, World War, 1939-1945

'Labor and capital in national politics' -- subject(s): American Federation of Labor, Chamber of Commerce of the United States of America

'A reference guide to the study of public opinion' -- subject(s): Bibliography, Propaganda, Public opinion, Public relations, Publicity

'Public opinion' -- subject(s): Public opinion