00306nam a2200097Ia 450000500170000000800410001705000180005810000140007624500820009026000360017220251229085140.0251229s9999    xx            000 0 und d  aPE  1475  .B3  aBaker, C. 0aTechnical publicationsb  Their purpose, preparation and production.cC Baker  aLondon Chapman & Hall Ltdb1957