| 1932 - 68 стор.
A monthly periodical on the law of the labor problem. | |
| 1931 - 280 стор.
A monthly periodical on the law of the labor problem. | |
| 1929 - 284 стор.
A monthly periodical on the law of the labor problem. | |
| 1929 - 556 стор.
A monthly periodical on the law of the labor problem. | |
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