by WILLITS, J. H.
Published in Monthly review of the U.S. Bureau of Labor Statistics (01.09.1917)

by WILLITS, J H
Published in Proceedings of the American Philosophical Society (1946)

by Willits, J H
Published in The American Economic Review (01.01.1924)

by Willits, J H
Published in Annals of the American Academy of Political and Social Science (01.03.1917)

by Willits, J H
Published in Annals of the American Academy of Political and Social Science (01.03.1917)

Published in The Annals of the American Academy of Political and Social Science (01.01.1917)

by Willits, J H
Published in Annals of the American Academy of Political and Social Science (01.01.1917)

by Willits, J H
Published in Annals of the American Academy of Political and Social Science (01.01.1917)

Published in The Annals of the American Academy of Political and Social Science (01.11.1916)

by Willits, J H
Published in Annals of the American Academy of Political and Social Science (01.11.1916)

by Willits, J H
Published in Annals of the American Academy of Political and Social Science (01.05.1916)

by Willits, J H
Published in Annals of the American Academy of Political and Social Science (01.05.1916)

by Willits, J H
Published in Annals of the American Academy of Political and Social Science (01.03.1916)

by Willits, J H
Published in Annals of the American Academy of Political and Social Science (01.03.1916)

by Willits, J H
Published in Annals of the American Academy of Political and Social Science (01.01.1916)

Published in The Annals of the American Academy of Political and Social Science (01.01.1916)

by Willits, Joseph H.
Published in Science (American Association for the Advancement of Science) (25.02.1949)

by Willits, Joseph H.
Published in Annals of the American Academy of Political and Social Science (01.11.1916)

by Willits, Joseph H.
Published in The American economic review (01.03.1935)

by Bladen, V W, Easterbrook, W T, Willits, J H
Published in The American economic review (01.03.1953)