The recommendation of the TSC for a thorough search is to begin with the arrowed searches on the table below. If no match is found, member libraries are expected to try various combinations of the other searches before concluding that no matching record exists in the RiverShare ILS. Searching only by ISBN is not considered a thorough search.
Source: http://www.marcofquality.com/presentations/JCC/JCC_PPTw/3b.JCC.Appendices.SearchingTable.htm