Chapter 28
A treatise on ordinary and partial differential equations by William Woolsey Johnson. 1913

28.1 Chapter 1, Nature and meaning of a differential equation between two variables. page 12
28.2 Chapter 2, Equations of the first order and degree. page 20
28.3 Chapter VII, Solutions in series. Examples XIV. page 177
28.4 Chapter VII, Solutions in series. Examples XV. page 194
28.5 Chapter VII, Solutions in series. Examples XVI. page 220
28.6 Chapter IX, Special forms of differential equations. Examples XVII. page 247