Keenan, Philip C. |
The earliest national observatories in Latin America / Philip C. Keenan |
In: National observatories. p. 21-30 |
Casanovas, Juan |
The observations of comets by Valentin Stansel, a Seventeenth century missionary in Brazil / Juan Casanovas S.I., Philip C. Keenan |
In: Archivum historicum Societatis Iesu A. 62, fasc. 124 (1993), p. 319-330 |