| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Perfecting the Pig Environment | 978-1-9O4761-81-5 (1-9O4761-81-X) | 2009 | P. Smith · N. Bird |
H. C. · Heather Crabtree · Helen K. Crabtree · Hugh Crabtree · R. H. Crabtree · Robert H. Crabtree · Sally Hobson Sally Crabtree