Study of Gary Snyder's eco-ethic thoughts A 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 eco-ethic thoughts Study on Zhang Xunhua's economic 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 Study of Marx's democratic thought Study on Chen Zheng's economic thoughts Study on Song Tao's economic thoughts a study Gary Snyder's cultural thoughts