@book{block_dalitz_1963, 
  title={THE STRUCTURE OF THE WEAK INTERACTION $lambda$ + N $Yields$ N + N}, 
  DOI={10.2172/4677039}, 
  institution={Office of Scientific and Technical Information  (OSTI)}, 
  author={Block and Dalitz}, 
  year={1963}, 
  month={May}
  }