TY - BOOK T1 - Operational mathematics A1 - Churchill, Ruel V. LA - English PP - New York PB - McGraw-Hill Book Company YR - 1958 UL - http://vufind10-pruebas.sigbunlp.bibliotecas.unlp.edu.ar/Record/das.583 OP - 337 KW - Análisis Matemático ER -