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San Juan; Porto Rico, [1919?-1924?] / No. 2 (February 15th, 1919) [?]-no. 65 (February 15th, 1924) [?]
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San Juan; Porto Rico, [1924-1937?] / No. 1 (March 15, 1924)-no. 80 (July 6, 1937) [?]
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Rio Piedras: Univ., 1902- ; Washington, DC: Gov. Print. Off., anfangs / 1.1903; 2.1902 -
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Washington, DC, [1909?-1946?] / No. 8 (1909) [?]-25. (1946) [?]
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Rio Piedras: Univ, 1904-1952 ; Washington, DC: Gov.Print.Off., anfangs / Nr. 2.1904 - 35.1952 nachgewiesen
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San Juan: University of Puerto Rico, [1917]- / Vol. 1, no. 1 (January 1917) -
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Mayagüez, Puerto Rico: Centro Hermisférico de Cooperación en Investigación y Educación en Ingeniería y Ciencia Aplicada, [1991]- / Vol. 1, no. 1 (1991)-