11.   Moms have always worked, but it was a big secret left out of the history books.

12.   Serious history books sell in large numbers, are serialised in newspapers, televised and debated.

13.   The battle is important in the history books as one of the final skirmishes in that war, as Gen.

14.   The blighters have even been immortalised in the history books.

15.   The history book could not get by in the same manner.

16.   There are individual differences, but all history books tend to organise information in an hierarchical way.

17.   Yet even as the competition fades into the history books, something also seems to be shaking the foundations of capitalism.

18.   A momentous occasion that will go down in the history books.

19.   He will be given his rightful place in the history books.