Leendert
None of us is any wiser than the latest research and as we both know that is an ever ongoing affair
Boer's book was published in 2016 by Batavian Lion International ISBN 978 90 6707 685 2. Since it is a book from the perspective of the aircraft (each aircraft used during the period is discussed individually), it suffers from the usual drawback such a book always gets, you read about the same dates many many times. But since each and every individual aircraft are detailed, it is worth every penny.
It is the only one I have by him, but I also have his Dutch Mitchell stuff from the Internet, and after reading that complex story, I bought this one knowing it just had to be good....
Cheers
Stig