| GMD | BOOK |
| Classification | 624 GRA |
| Publisher | London, QED Books, 2012-04-01 |
| Subject | Underground architecture |
| Topic | Engineering |
| ISBN | 9781848356566 |
| Additional ISBN | 1848356560 |
| URL | books.google.com.hk/books?id=0_cdygAACAAJ&dq=isbn:9781848356566&hl=&cd=1&source=gbs_api |