Sources of unit cost data (UK£ 2012).
Deave Toity,Hawkins Adrian,Kumar Arun,Hayes Mike,Cooper Nicola,Watson Michael, Ablewhite Joanne,Coupland Carol,Sutton Alex,Majsak-Newman Gosia,McDaid Lisa,Goodenough Trudy,Beckett Kate,McColl Elaine,Reading Richard,Kendrick Denise PLOS ONE(2017)
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