00345nam a2200157Ia 4500008004100000020000900041035000900050082001300059100001800072245002700090250000600117260003400123300000800157500000800165650001400173210723s9999||||xx |||||||||||||| ||und||  aNULL  a7722  a541BSTA  aStape, Helmut 0aTechnical Fundamentals  a-  aBombaybAsia Publishing House  a242  a980  aChemistry