lispdoc - results for gcd

(gcd &rest integers)
Function: Return the greatest common divisor of the arguments, which must be integers. Gcd with no arguments is defined to be 0.
 Mentioned in:
CLtL2 - 1.2.3. Evaluation, Expansion, and Equivalence
CLtL2 - 12.4. Arithmetic Operations
CLtL2 - 4.5. Type Specifiers That Specialize
HyperSpec - Function GCD