费曼物理学讲义 习题集 Exercises in introductory physics
Christian Ethics: An Introductory Reader
计量经济学导论:现代观点 (第六版) Introductory Econometrics: A Modern Approach (Sixth Edition)
Introductory LaTeX
SPSS for Introductory and Intermediate Statistics: SPSS for Intermediate Statistics: Use and Interpretation