lispdoc - results for alpha-char-p

(alpha-char-p char)
Function: The argument must be a character object. ALPHA-CHAR-P returns T if the argument is an alphabetic character, A-Z or a-z; otherwise NIL.
 Mentioned in:
CLtL2 - 13. Characters
CLtL2 - 13.2. Predicates on Characters
CLtL2 - 13.4. Character Conversions
HyperSpec - Function ALPHA-CHAR-P