(1938). The results of compulsory labour service in Bulgaria from 1933 to 1936-37. International Labour Organization.
Citazione stile Chigago Style (17a edizione)The Results of Compulsory Labour Service in Bulgaria from 1933 to 1936-37. International Labour Organization, 1938.
Citatione MLA (9a ed.)The Results of Compulsory Labour Service in Bulgaria from 1933 to 1936-37. International Labour Organization, 1938.
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