"vid min sida" is used for a companion or similar, that is by your side in a more abstract sense. When talking in general of something/someone actually positioned by your side, it's typically "brevid mig".
This is a fixed expression and can’t be transferred to talking about pages. :) Then you’d say sida efter sida.
"...tillsammans hjälps dom åt, staten och kapitalet, dom sitter i samma båt''.