Pullus impexus (Muls.) (Coleoptera, Coccinellidae), a predator of Adelges piceae (Ratz.) (Hemiptera, Adelgidae)
Subtitle: with notes on its parasites. (European investigations). ...
By: by Vittorio Delucchi ...
Series: Prom -- nr. 2239
Publisher: Commonwealth institute of entomology
Published: 1954
Place of publication: London
Language: eng
Number of pages: 278
Notes: Issued also as B̀ulletin of entomological research, vol. 45.'

Curriculum vitae.

Thesis--Swiss federal institute of technology, Zurich.