#+name: block1
#+begin_src emacs-lisp :results table
'((1 2) (3 4))
#+end_src

#+name: block2
#+begin_src emacs-lisp :results table
'((5 6) (7 8))
#+end_src


#+begin_src emacs-lisp
(append
'<<block1()>>
'<<block2()>>)
#+end_src