Frontier Society
Martinus Njhoff, 1971
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Cole, John W.
The Hidden frontier
Academic Press, 1974
 Buku Teks SO
Oceanography the last frontier
edited by Richard C. Vetter
Voice of America, 1974
 Buku Teks
Kokot, Jozef
logic of the Oder-Neisse frontier
Pozman: Wydawnictwo Zachodnie, [1957]
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Dobson, Rosemary
Over the frontier / by Rosemary Dobson
Angus & Robertson, 1978
 Buku Teks