韓乾

土地資源環境經濟學 / by: 韓乾 (Language materials, printed)

農地變更使用之研究. = 土地資源鑑識與農場經營之土地利用 / by: 陳麗紅; 韓乾 (Language materials, printed)

研究方法原理 = = Principles of research methods : 論文寫作的邏輯思維 : the logic of dissertation writing / by: 韓乾 (Language materials, printed)

研究方法原理 = = Principles of research methods:the logic of dissertation writing : 論文寫作的邏輯思維 / by: 韓乾 (Language materials, printed)