a naturalist's guide to the birds of sri lanka A naturalist's guide to the birds of Sri Lanka Photographic guide to the birds of China a photographic guide to the birds of southeast asia : Field guide to the birds of Guangxi 并列题名：Field guide to the birds of Guangxi a naturalists journeys on the roof of the world a naturalist's journeys on the roof of the world a non-believer's guide to the uses of religion / Guide to the birds of China