This is not officially volume 21 in the series (not enough papers were received to warrant this).
From the publisher's website:
As there was no 21st Symposium Volume produced due to the lack of papers presented to make a volume a 'Special Issue - Insects and Disease' of Physiological Entomology has been produced,
There are currently no reviews for this product. Be the first to review this product!
Your orders support book donation projects
This really is first rate customer service.
Search and browse over 110,000 wildlife and science products
Multi-currency. Secure worldwide shipping
Wildlife, science and conservation since 1985