TERCE – Aportes de la enseñanza – Matemática
https://unesdoc.unesco.org/ark:/48223/pf0000244855?posInSet=3&queryId=85bfb18f-ab2d-4894-a4eb-a5f6229edeb7
https://unesdoc.unesco.org/ark:/48223/pf0000244855?posInSet=3&queryId=85bfb18f-ab2d-4894-a4eb-a5f6229edeb7