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48 lecciones de matemáticas : aritmética, álgebra, geometría, trigonometría.

By Porta Caretto, Domingo.
Buenos Aires : Hobby, 1936 .
4 v. ; 26 cm.

By Lapieza Cabral, Ángel.
Buenos Aires : Hobby, 9540 .
219 p. : 23 cm.

By Sani, Federico.
Buenos Aires : Hobby, 1961 .
435 p. : 30 cm.

Buenos Aires : Hobby, 1944 .
264 p. : 28 cm.

By Evelson, M.
Buenos Aires : Hobby, 1979 .
349 p. : 25 cm.

By Sani, Federico.
Buenos Aires : Hobby, 1944 .
264 p. : 27 cm.

By Laudien, Karl.
Buenos Aires : Hobby, 1945 .
213 p. : 23,5 cm.

By Rodríguez, Miguel A.
Madrid : Hobby Press, 1984 .
288 p. : 27 cm.
8486249082

By Rodríguez, Miguel.
Madrid : Hobby Press, 1984 .
p. 289-576 : 8486249090

By Rodríguez, Miguel.
Madrid : Hobby Press, 1984 .
p. 577-864 : 28 cm.
8486249109

By Evelson, M..
Buenos Aires : Hobby, 1958

By Chiesa, Américo.
Buenos Aires : Hobby, 1948