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Publicación histórica. El título y la fecha se derivan del nombre de archivo original; los datos bibliográficos no se han verificado de forma independiente.
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- Twentieth century cook book 1905
- Twentieth century hand book for steam engineers 1913
- Twentieth century horse book-handling and educating the horse 1902
- Twentieth century manual of railway and commercial telegraphy 1902
- Twenty years of education for journalism 1929
- Twenty years on the trap line-notes written during a 20 yrs on the nw plains 1891
- Twenty years with the indicator-being a practical text-book for the engineer 1894
- Twenty years with the indicator-being a practical textbook for the engineer or the student 1909
- Two visits to the tea countries of china vol 1 1853
- Two visits to the tea countries of china vol 2 1853
- Types and details of bridge construction vol 1 1904
- Types and details of bridge construction vol 2 1904
- Types and details of bridge construction vol 3 1904
- Types of aeroplanes 1912
- Types of canoes on puget sound 1920
- Types of ore deposits 1911
- Types of teaching 1915
- Typhoid fever considered as a problem of scientific medicine 1918
- Typographical printing-surfaces-the technology and mechanism of their production 1916
- USD-1918-complete