Good Pharmaceutical Freeze-Drying Practice

Biologia Centrali-Americana: Insecta. Hymenoptera, Volume 3

A Monograph of the British Phytophagous Hymenoptera: (Tonthredo, Sirex and Cynips, Linné.)

Hymenoptera Orientalis: Or, Contributions to a Knowledge of the Hymenoptera of the Oriental Zoological Region

A Monograph of the British Phytophagous Hymenoptera ...

A Monograph of the British Phytophagous Hymenoptera: Volume 1

A Monograph of the British Phytophagous Hymenoptera ...: Tenthredo, Sirex and Cynips, Linné

A Monograph of the British Phytophagous Hymenoptera ...

A Monograph of the British Phytophagous Hymenoptera ...

A Monograph of the British Phytophagous Hymenoptera: Volume 1

A Monograph of the British Phytophagous Hymenoptera ...: Tenthredo, Sirex and Cynips, Linné

A Monograph of the British Phytophagous Hymenoptera ...: Tenthredo, Sirex and Cynips, Linné

A Monograph of the British Phytophagous Hymenoptera ...

A Monograph of the British Phytophagous Hymenoptera ...: Cynipidae and appendix

A Monograph of the British Phytophagous Hymenoptera ...

A Monograph of the British Phytophagous Hymenoptera ...: Cynipidae and appendix

A Monograph of the British Phytophagous Hymenoptera ...: Tenthredo, Sirex and Cynips, Linné

A Catalogue of the British Tenthredinidae

A Monograph of the British Phytophagous Hymenoptera ...

A Monograph of the British Phytophagous Hymenoptera ...: Tenthredo, Sirex and Cynips, Linné