If you find the information provided in the Open Cluster Database
to be of significant use in your research, reference to use of the
database may be made by the following acknowledgement in a footnote:

"Open Cluster Database, as provided by C.F. Prosser and J.R. Stauffer,
and which currently may be accessed at http://www.noao.edu/noao/staff/cprosser/,
or by anonymous ftp to 140.252.1.11, cd /pub/prosser/clusters/."