If the record has both the publication and copyright dates, then the 008/06 should be "t" and the 008/11-14 should have the copyright date. See LC-PCC PS 2.8.6.6 for examples. LC-PCC PS for 2.8.6.6 -- DATE OF PUBLICATION NOT IDENTIFIED IN THE RESOURCE <<<<<---------->>>>> DtSt Type of Date/Publication Status (OCLC MARC BIBLIOGRAPHIC) t Publication date and copyright date . The item has a publication, release or production date and a copyright date. Date 1 is the year of publication, release, or production; Date 2 , the year of copyright. Treat deposit dates (preceded by D.L.) as copyright dates. DtSt: t Dates: 1966, 1962 [1966, c1962 ( 1968 printing )] DtSt: t Dates: 1966,1965 [1966, c1965] DtSt: t Dates: 1980,1957 [1980 printing, c1957] DtSt: t Dates: 198u,1979 260 Berlin : ‡b Springer, ‡c [198-?], c1979. DtSt: t Dates: 1982,1949 260 London : ‡b Macmillan, ‡c 1982, c1...