This set is a great complementary resource to other set in the series in terms of progression, but works perfectly well as a standalone resource too. (tes.com)
These lists are a useful complementary resource to other reference resources in the series, but are a useful standalone resource too. (tes.com)
Where there is a lack of complementary resources, large scale storage, especially chemical or thermal, can be used to supplement. (pv-magazine-usa.com)