Complex sentence: There are however several other important distinctions between Litvish, Poylish, and Ukrainish that are not indicated in either the SYO or Weinreich dictionary, but are discussed in detail in the LCAAJ, to which Weinreich was also a major contributor.
Split into simpler sentences: There are however several other important distinctions between Litvish, Poylish, and Ukrainish that are not indicated in either the SYO or Weinreich dictionary. These are however discussed in detail in the LCAAJ, to which Weinreich was also a major contributor.