Philosophy in revolution

作者：  (美)赛尔山姆(Selsam H.)著;吴永泉，周颖如译

出版社：生活·读书·新知三联书店,1960

简介：

Greg's Microscope格雷格的显微镜ISBN9780064441445

作者：  Selsam

出版社：HarperCollins 1990年09月

简介：　　Greg makes fascinating discoveries about things he finds athome when he looks at them through his new microscope. 'An accurateand entertaining book for beginning independent readers.