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Usage of data from The Echinoid Directory in scientific publications should always be acknowledged using one of the following formats:
Citations to the entire site. Smith, A. B.& Kroh, A. (editor) 2011. The Echinoid Directory. World Wide Web electronic publication. http://www.nhm.ac.uk/research-curation/projects/echinoid-directory [accessed **]
** Please give the precise date you used The Echinoid Directory
Individual pages contributed since September 2006 are individually authored and dated in the top left-hand corner. These can be cited separately – e.g.
Coppard, S. E. September, 2006. Coelopleurus (Keraiophorus) exquisitus Coppard & Schultz, 2006, in Smith, A. B. & Kroh, A. (editors) The Echinoid Directory.
World Wide Web electronic publication. http://www.nhm.ac.uk/research-curation/projects/echinoid-directory/