edited by Charles Moritz
H.W. Wilson, 1966
Buku Referensi
edited Marjorie Dent Candee
H.W. Wilson, 1955
Buku Teks
New York, Department of Public Information United Nations, 1957
Buku Referensi
edited by Anna Rothe
H.W. Wilson, 1950
Buku Referensi
edited by Anna Rothe
H.W. Wilson, 1947
Buku Referensi