00345nam a2200097Ia 4500008004100000082001600041100004000057245009700097260004500194300000800239140113s9999    xx            000 0 und d  a581.15   L8  a"Broertjes, C. & Vanttartern, A.M."  aApplication of mutation breeding methods in the improvement of vegetatively propagated crops  a1978bElsevier Publishing Co.cAmsterdam  a316