EERO LAAKSOVIRTA “MOSSE” DOING A CHEMICAL DEMONSTRATION, 1965
PHOTOGRAPHER UNKNOWN – SOURCE: TOIMIHENKILÖARKISTO / SALON OPETTAJAYHDISTYSPIIRIN ARKISTO
THE LEGAL RIGHTS TO THIS SO CALLED ORDINARY PHOTOGRAPH HAVE EXPIRED AS MORE THAN 50 YEARS HAVE PASSED SINCE THE YEAR IT WAS TAKEN