%0 conference lecture %@ %A Schnier, C.,Niedergesaess, R.,Pepelnik, R.,Schnug, E. %D 1988 %J XIXth Annual Meeting of the =European Society of Nuclear Methods in Agriculture (ESNA) %N %P %T Multielement investigations of fertilizer phosphates by means of instrumental neutron activationanalysis (INAA) %U %X