Era
1945-
3
20th century
3
1990
2
16th century
1
16th century --
1
1868-
1
1871-1918
1
1893-
1
1918-1945
1
1925-
1
1939-1945
1
1949-
1
1950-
1
1981-
1
Asia - Periodicals
1
Case studies
1
Commerce
1
Congresses
1
Pacific Area - Periodicals
1
Pictorial works
1
Problems, exercises, etc
1
handbooks, manuals, etc
1