Is the sentence in bold correct? This excerpt is from a manuscript I'm editing:
Then there were a number of new researches published before the second edition of this book went to print, which are not mentioned individually in order not to make the list too long. Some additions and revisions have been made in the second edition, but we have tried not to make major changes to the book. The writers and chapters each of them have contribute to are as followed:
I think sentence construction used here is wrong because of following reasons:
- "contribute" should be changed to "contributed".
- There are two verbs without relative clause.