Davidson, Lionel
The rose of Tibet / Lionel Davidson
Oxford University Press, 1980
 Buku Teks SO
Curtis, Lionel
The capital question of China / Lionel Curtis
Macmillan, 1932
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Harper, Laurel
Graphic radical
Chronicle Books, 1999
 Buku Referensi
Radical criminology
edited by James A. Inciardi
Sage, 1980
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Woods, Lebbeus
Radical reconstruction
Princeton Architectural Press, 1997
 Buku Teks SO