Koryŏ chibang chedo ŭi yŏnʾgu /

by Ha, Hyŏn-gang, Ha, Hyŏn-gang, Ha, Hyŏn-gang
Published 1977

Hanʼguk chungsesa yŏnʼgu /

by Ha, Hyŏn-gang, Ha, Hyŏn-gang, Ha, Hyŏn-gang
Published 1988

Hanʾguk chungsesa non /

by Ha, Hyŏn-gang, Ha, Hyŏn-gang
Published 1989

Hanʾguk ŭi yŏksa /

by Ha, Hyŏn-gang, Ha, Hyŏn-gang
Published 1979

Kyoyang Hanʼguk sa /

by Ha, Hyŏn-gang, Ha, Hyŏn-gang
Published 1974

Han'guk ŭi yŏksa /

by Ha, Hyŏn-gang
Published 1999

Hanʾguk chungsesa yŏnʾgu /

by Ha, Hyŏn-gang
Published 1996

Hanʼguk ŭi yŏksa /

by Ha, Hyŏn-gang
Published 1982

Hanʼguk yŏsŏng ŭi chŏntʻongsang /

Published 1985

Han'guksa ŭi kujo wa chŏn'gae : Ha Hyŏn-gang Kyosu chŏngnyŏn kinyŏm nonch'ong /

Published 2000