1. 
   ABTA
   American Brain Tumor Association
   Found op http://www.encyclo.co.uk/local/20895
   
   
2. 
   ABTA
   Association of British Travel Agents
   Found op http://www.aea.be/glossary/
   
   
3. 
   abta
   1) American brain tumor association
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/abta/1
   
   

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