a study of gary snyder's eco-ethic thoughts A study of Gary Snyder's eco-ethic thoughts Study of Gary Snyder's eco-ethic thoughts 并列题名：Study of Gary Snyder's eco-ethic thoughts a study of Gary Snyder's ecopoetics a study Gary Snyder's cultural thoughts A study of Gary Snyder's eco-ethic thoughts：佛山科学技术学院科学研究著作资助出版 a study of Heller's aesthetic thought a study of Platonov's creative thoughts Study on Zhang Xunhua's economic thoughts