Kyōkai no rekishi /

by Dawley, Powel Mills, 1907-
Published 1967

Kyōkai no reihai /

by Shepherd, Massey Hamilton, 1913-
Published 1966

Kyōkai no shinkō /

by Pike, James A (James Albert), 1913-1969, Pittenger, W. Norman (William Norman), 1905-1997
Published 1966

Kyōkai no seisho /

by Dentan, Robert C (Robert Claude), 1907-1995
Published 1965