00351nam a2200133Ia 4500 211228s9999 xx 000 0 und d Jayakar Knowledge Resource Centre Pantin,C.F.A. Science and education University of wales press Cardiff 1963 53p. p. Science 1 222695 222695 0 0 0 0 2 2 2 0000-00-00 0 Az7 J3 304025 2022-01-11 0000-00-00 1