Chapter 88
Elementary Differential Equations. By Lee Roy Wilcox and Herbert J. Curtis. 1961 first edition. International texbook company. Scranton, Penn. USA. CAT number 61-15976

88.1 Chapter 1. Introduction. Exercise at page 6
88.2 Chapter 1. Introduction. Exercise at page 16
88.3 Chapter 1. Introduction. Exercise at page 22
88.4 Chapter 2. Differential equations of first order. Exercise at page 33
88.5 Chapter 2. Differential equations of first order. Exercise at page 35
88.6 Chapter 2. Differential equations of first order. Exercise at page 38
88.7 Chapter 2. Differential equations of first order. Exercise at page 41
88.8 Chapter 2. Differential equations of first order. Exercise at page 44
88.9 Chapter 2. Differential equations of first order. Exercise at page 48
88.10 Chapter 2. Differential equations of first order. Exercise at page 52
88.11 Chapter 2. Differential equations of first order. Exercise at page 54
88.12 Chapter 2. Differential equations of first order. Miscellaneous Exercises at page 55
88.13 Chapter 4. Linear equations. Exercises at page 86
88.14 Chapter 4. Linear equations. Exercises at page 93
88.15 Chapter 4. Linear equations. Exercises at page 97
88.16 Chapter 4. Linear equations. Exercises at page 116
88.17 Chapter 5. Special Techniques for Linear Equations. Exercises at page 127
88.18 Chapter 5. Special Techniques for Linear Equations. Exercises at page 133
88.19 Chapter 5. Special Techniques for Linear Equations. Exercises at page 139
88.20 Chapter 5. Special Techniques for Linear Equations. Exercises at page 146
88.21 Chapter 5. Special Techniques for Linear Equations. Exercises at page 149
88.22 Chapter 5. Special Techniques for Linear Equations. Exercises at page 160 (Laplace transform)
88.23 Chapter 5. Special Techniques for Linear Equations. Miscellaneous Exercises at page 162
88.24 Chapter 7. Series Methods. Exercises at page 202
88.25 Chapter 7. Series Methods. Exercises at page 212
88.26 Chapter 7. Series Methods. Exercises at page 220
88.27 Chapter 7. Series Methods. Exercises at page 226