Laubach, F. C. (1960). Thirty years with the silent billion: Adventuring in literacy. Fleming H. Revell Company.
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Chicago-čujuhus (17. p.)
Laubach, Frank C. Thirty Years with the Silent Billion: Adventuring in Literacy. London: Fleming H. Revell Company, 1960.
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MLA-čujuhus (9. p.)
Laubach, Frank C. Thirty Years with the Silent Billion: Adventuring in Literacy. Fleming H. Revell Company, 1960.
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