[经] credit theory of business cycle

jīng jì zhōu qī de xìn dài lǐ lùn ㄐㄧㄥ ㄐㄧˋ ㄓㄡ ㄑㄧ ㄉㄜ˙ ㄒㄧㄣˋ ㄉㄞˋ ㄌㄧˇ ㄌㄨㄣˋ