Crossref handling of book chapters

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 82.35294% with 3 lines in your changes missing coverage. Please review.

Project coverage is 91.37%. Comparing base (3e25041) to head (4268d67).

Files with missing lines	Patch %	Lines
adsingestp/parsers/crossref.py	82.35%	3 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #141 +/- ## ========================================== - Coverage 91.46% 91.37% -0.09% ========================================== Files 25 25 Lines 2858 2863 +5 ========================================== + Hits 2614 2616 +2 - Misses 244 247 +3 ```

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