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It is proposed that the proper procedure for positing hierarchical levels between Work and Manifestation (Edition), in the FRBR (or WEMI) hierarchy, is to make a study of all the editions of selected works as recorded in OCLC WorldCat, and to determine inductively the most useful hierarchical levels between the top level of the Work and the lower and traditional level of the Manifestation or Edition. WorldCat was searched for all works by children's author Eileen Christelow. The 652 bib records were assigned to works, subclassified by key properties. Two intermediate levels popped out from this analysis: language and format.