Helburn, I. B. (1971). Public employer-employee relations in Texas ; contemporary and emerging developments. Institute of Public Affairs.
Lua i Stíl Chicago (17ú heag.)Helburn, I. B. Public Employer-employee Relations in Texas ; Contemporary and Emerging Developments. Austin: Institute of Public Affairs, 1971.
Lua MLA (9ú heag.)Helburn, I. B. Public Employer-employee Relations in Texas ; Contemporary and Emerging Developments. Institute of Public Affairs, 1971.
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