A year of Costa Rican natural history

Amelia Smith Calvert

Hamlet

William Shakespeare

Biologia centrali-americana

Philip Powell Calvert

Catalogue of the Odonata, Dragonflies, of the Vicinity of Philadelphia

Philip Powell Calvert

Insecta. Odonata

Philip Powell Calvert

The neotropical species of the "Subgenus Aeschna" sensu Selysii 1883 (Odonata)

Philip Powell Calvert

The odonate collections of the California Academy of Sciences from Baja California and Tepic, Mexico

Philip Powell Calvert

Report on Odonata

Philip Powell Calvert

Gomphus Dilatatus, Vastus and a new species, Lineatifrons (Odonata)

Philip Powell Calvert

Catalogue of the Odonata, dragonflies, of the vicinity of Philadelphia

Philip Powell Calvert

The neotropical species of the "Sibgenus Aeschna" Sensu selysii 1883 (Odonata)

Philip Powell Calvert

Odonata from Tepic, Mexico, with supplementary notes on those of Baja California

Philip Powell Calvert

Review of Straub's work on Odonata

Philip Powell Calvert

New taxonomic entities in neotropical aeshnas (Odonata: Aeshnidae)

Philip Powell Calvert

Ezra Townsend Cresson

Philip Powell Calvert

Illustrations of Odonata

Hermann August Hagen

Biologia centrali-americana.

Autor desconhecido

Biologia centrali-americana.

Autor desconhecido

Scientific results of the U.S. eclipse expedition to West Africa, 1889-'90

Charles V. Riley