What is the latest copyright for Rod & Staff English 4?

[jail warden]

Does anyone know? Or at least how can I find out?

Thanks!!!

[coffeefreak]

Call them, they're always really helpful. But, with R&S the copyright shouldn't be an issue. They are pretty steady/not a lot of revisions.
Blessings!

[Ellie]

All of the English texts have been revised (or published) since 1990, so any copyright date after that is current.