lispdoc - results for nunion

(nunion list1 list2 &key key (test #'eql testp) (test-not nil notp))
Function: Destructively return the union of LIST1 and LIST2.
 Mentioned in:
CLtL2 - 15.5. Using Lists as Sets
HyperSpec - Function UNION, NUNION
PCL - what frames do you actually need