00278nam a2200109Ia 450000500170000000800410001708200140005810000200007224500250009226000430011730000080016020260224040953.0260224s9999||||xx |||||||||||||| ||und||  a581.8 JOH  aJohansen, D.A.  0aPlant microtechnique  aNew York: Mc-Graw-Hill Book Co. c1940  a523