00298nam a2200097Ia 4500008004100000082002100041100001900062245005900081260005300140300000700193140113s9999 xx 000 0 und d a632.4:633.13 L0 a"Simons, M.D." aCrown rust of oats and grasses (A.P.S. Monograph no.5) a1970bAmerican Phytopathological Soc.cMinesotta a47