Complex sentence: She also turned once more to indexing and was asked by the Cambrian Archaeological Association to do so for its "Archaeologia Cambrensis", and this was published in 1964; it has been described as the "best index for this particular publication".
Split into simpler sentences: She also turned once more to indexing and was asked by the Cambrian Archaeological Association to do so for its "Archaeologia Cambrensis". Her index was published in 1964 and it has been described as the "best index for this particular publication".