Schaefer, K. (1914). Die deutschen Arbeitersekretariate.
I tāruatia paitia ki te papatopenga
Kua rahua te tārua ki te papatopenga
Tohutoru Kātū Chicago (17th ed.)
Schaefer, Kornelius. Die Deutschen Arbeitersekretariate. Bonn, 1914.
I tāruatia paitia ki te papatopenga
Kua rahua te tārua ki te papatopenga
Tohutoro MLA (9th ed.)
Schaefer, Kornelius. Die Deutschen Arbeitersekretariate. 1914.
I tāruatia paitia ki te papatopenga
Kua rahua te tārua ki te papatopenga
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