00286nam a2200097Ia 4500008004100000082001700041100002900058245005500087260003800142300000800180140113s9999    xx            000 0 und d  a543.544   M2  a"Touchstone, Joseph. C."  aPractice of thin layer chromatography. 2nd edition  a1982bJohn Wiley & SonscNew York  a405