Title varies slightly.
Editors: volume 1- Heliodoro Alonso Aguirre, Joaquin Maldonado Sánchez.
Founded by Heliodoro Alonso Aguirre and Joaquín Maldonado Sánchez ; continued by J. Maldonado Sánchez.
Imprint varies.
In double columns.
Index compiled annually, appearing in December issue for each year.