>Guidelines for working with RDA and non-RDA records prior to implementation of RDA - Program for Cooperative Cataloging (Library of Congress)...
The following guidelines were recommended by the Task Group on Hybrid Bibliographic Records (Sept. 1, 2011). The recommendations were approved by the PCC Policy Committee. The documents include guidelines for working with RDA and non-RDA records for monographs, serials, and integrating resources prior to implementation of RDA.
The guidelines include PCC Task Group on Hybrid Integrating Resource Records (Word 97 KB) Final report, dated April 25, 2012: on recommendations and guidelines for creating a hybrid record from a pre-RDA record.
Check out the links here: http://www.loc.gov/aba/pcc/rda/PCC%20RDA%20guidelines/Bib-Interim-RDA.html