BIBCYT http://bibcyt.ucla.edu.ve/cgi-win/be_alex.exe?Ultimo&Nombrebd=BIBCYT UCLA - Biblioteca de Ciencias y Tecnologia Felix Morales Bueno Practical Astronomy:A Textbook for Engineering Schools and Manual of Fields Methods http://bibcyt.ucla.edu.ve/cgi-win/be_alex.exe?Acceso=T070300002848&Nombrebd=BIBCYT Autor: Hosmer, George L.Robbins James M.