Whichever option you prefer, you should look for a book that has been written by a credible author with real knowledge of infants, and who has a good, established reputation. (pregnancy-info.net)
These companies were led by innovative publishers with real knowledge of the market who could see the opportunities that existed and were prepared to take advantage of them. (slaw.ca)
That arises because the probability distributions on the key inputs to the models have to be so wide, given the lack of real knowledge about so many of them. (judithcurry.com)