K'osǔt'a Rik'a k'op'i kǒngje ǔi si-kongganjǒk chǒn'gae ǔi chiyǒkchǒk ch'ai - Im, Su-jin (Sǒul Taehakkyo Kukt'o Munje Yǒn'guso, 2005)
PST: Time-space manifestation and regional differentiation of the Costa Rican coffee economy. - Zsfassung in engl. Sprache