Assiter, Alison
Enlightened women: modernist feminism in a postmodern age
Routledge, 1996
Buku Teks SO
Cole, John W.
The Hidden frontier
Academic Press, 1974
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Dobson, Rosemary
Over the frontier
Angus & Robertson, 1978
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Frontier Society
Martinus Njhoff, 1971
Buku Teks SO
Frontier Society
Martinus Njhoff, 1971
Buku Teks