Acknowledgments
Acknowledgment to NRAO and NSF: Any papers using observational material taken with NRAO instruments (VLBA or otherwise) or papers where a significant portion of the work was done at NRAO, should include the following acknowledgment to NRAO and NSF:
The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.
(see also http://www.nrao.edu/library/pagecharges.shtml for the full requirements for NRAO to provide publication support.)