Columbia subject headings:
Harvard subject headings:
Child labor--Austria--Lower Austria--History--19th century.
Child labor--Austria--Lower Austria--History--20th century.
Child labor--Austria--Vienna--History--19th century.
Child labor--Austria--Vienna--History--20th century.
Child labor--Law and legislation--Austria--Lower Austria--History--19th century.
Child labor--Law and legislation--Austria--Lower Austria--History--20th century.
Child labor--Law and legislation--Austria--Vienna--History--19th century.
Child labor--Law and legislation--Austria--Vienna--History--20th century.
Educational law and legislation--Austria--Lower Austria--History--19th century.
Educational law and legislation--Austria--Lower Austria--History--20th century.
Educational law and legislation--Austria--Vienna--History--19th century.
Educational law and legislation--Austria--Vienna--History--20th century.
Lower Austria (Austria)--Social conditions--19th century.
Lower Austria (Austria)--Social conditions--20th century.
Social legislation--Austria--Lower Austria--History--19th century.
Social legislation--Austria--Lower Austria--History--20th century.
Social legislation--Austria--Vienna--History--19th century.
Social legislation--Austria--Vienna--History--20th century.
Vienna (Austria)--Social conditions--19th century.
Vienna (Austria)--Social conditions--20th century.
Princeton subject headings:
Child labor--Austria--Lower Austria--History.
Child labor--Austria--Vienna--History.
Child labor--Law and legislation--Austria--Lower Austria--History.
Child labor--Law and legislation--Austria--Vienna--History.
Educational law and legislation--Austria--Lower Austria--History.
Educational law and legislation--Austria--Vienna--History.