PRIMARY DOCUMENTS PER PERIOD
PERIOD I (1491-1607)
PERIOD II (1607-1754)
PERIOD III (1754-1800)
PERIOD IV (1800-1848)
PERIOD V (1844-1877)
PERIOD VI (1865-1898)
PERIOD VII (1890-1945)
PERIOD VIII (1945-1980)
PERIOD IX (1980-Present)