Learn English – symbol out there capable of denoting a chapter in a citation

There is a symbol for it in predicate logic.

"And/or" is just called "or" and is represented as ∨, from the Latin vel meaning or. But note that it's a separate symbol from the letter "v", though similar.

In contrast, "or" in the sense of "this one or that one but never both" is called "exclusive or" or "xor" and can be symbolized as ⊻ or ⊕.

Also, in programming you might see "and/or" represented as | or as ||, and "xor" represented as ^. Which confusingly looks a lot like ∧, used in logic to mean "and".

For a person for whom both dates are known, use the form “1923–2003” (preferably, per CMS, with an en dash, not hyphen, double hyphen, or em dash); for one still living, just write “b. 1923.”