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Helen Roy的作品

Cover for Helen Roy · Field Guide to the Ladybirds of Great Britain and Ireland - Bloomsbury Wildlife Guides (Paperback Book) (2018)

Field Guide to the Ladybirds of ... (2018)

Cover for Helen Roy · Invasive Alien Arthropod Predators and Parasitoids: An Ecological Approach - Progress in Biological Control (Paperback Book) (2013)

Invasive Alien Arthropod Predato... (2013)

Cover for Helen Roy · Invasive Alien Arthropod Predators and Parasitoids: An Ecological Approach - Progress in Biological Control (Hardcover Book) [2012 edition] (2011)

Invasive Alien Arthropod Predato... (2011)