National Geographic : 1947 Feb
C) NIationai ueograpnhic Society Kodachrome by Richard H.Stewart School Children, Who Walked 12 Miles to See an Archeological Site, Stand on the 10-century-old Mound ofPiedra Parada Here the expedition uncovered a stone temple enclosed by five other structures, all fitting together like rings of onion skin. Their origin isuncertain. Pupils and teachers have trudged from Ocozocoautla, 12 miles distant. Dr. Matthew Stirling, leader of the expedition, stands hat inhand.