541,081 LEFKOVITS IVAN [red .] The immune system. Festschrift in honor of Niels Kaj Jerne on the occasion of his 70th birthday. Ed. by Charles M. Steinberg and Ivan Lefkovits with the assistance of Coatherine di Lorenzo. Basel 1981 S. Karger 9° Vol. 1 Past and future, s. XIX, nlb. 1, 438, il. Vol. 2 The present. s. XIX, nlb. 1, 470, il