The 1st of January 2011 the WSL library merged with three libraries of the ETH Domain (Eawag, Empa and PSI) to Lib4RI: Library for the Research Institutes within the ETH Domain. Information about Products and Services are available here:

Contact and information WSL Site

• Lib4RI: WSL
  Zürcherstrasse 111, CH-8903 Birmensdorf
  
  +41 44-739 23 33