0 official documents that allow someone from a foreign country or under 16 years old to be employed
1 in the US, legal documents that allow young people or people born outside the US to work there:
Scribe collected and had bound his librettos, scenarios, contracts, working papers, letters and financial accounts.
International literacy project working papers in relevant features of spoken and written language.
Working papers of the language behavior research laboratory, 46.
Working papers in grammatical theory and discourse structure : interactions of morphology, syntax, and discourse.
There are five additional comparative volumes, each covering a theme in more detail, nine case studies and 77 working papers.
Some seem to reach rather few conclusions and come across as working papers rather than articles ready to see the light of day.
Working papers in linguistics 39 (pp. 149 - 177).
Working papers as they appear are also available through the internet.