40 books
The Acarina or Mites: A Review of the Group for the Use of Economic Entomologists (Classic Reprint)
Bibliography of the More Important Contributions to American Economic Entomology Volume 7
The Structure of Certain Dipterous Larvae with Particular Reference to Those in Human Foods
Bibliography of the More Important Contributions to American Economic Entomology, Volumes 4-5
Bibliography of the More Important Contributions to American Economic Entomology, Part 4