@book{13, author = {Tweddle J.C. and Robinson L.D. and Pocock Michael J. O. and Roy Helen E.}, title = {Guide to citizen science: developing, implementing and evaluating citizen science to study biodiversity and the environment in the UK}, year = {2012}, publisher = {NERC/Centre for Ecology & Hydrology}, address = {Wallingford}, issn = { 978-1-906698-37-9}, language = {eng}, }