The ornithology of Illinois. Part I. Descriptive catalogue. By Robert Ridgway. Part II. Economic ornithology. By S. A. Forbes. Pub. by the authority of the state Legislature.

v.1 pt.1

The ornithology of Illinois. Part I. Descriptive catalogue. By Robert Ridgway. Part II. Economic ornithology. By S. A. Forbes. Pub. by the authority of the state Legislature.

v.2 pt.1

Tetraxonia, bearbeitet von Robert von Lendenfeld. Mit 44 abbildungen.

19

Die Physiologie des Kreislaufes / von dr. Robert Tigerstedt.

Bd. 3

Die Physiologie des Kreislaufes / von dr. Robert Tigerstedt.

Bd. 2

Die Physiologie des Kreislaufes / von dr. Robert Tigerstedt.

Bd. 1

The cyclopædia of anatomy and physiology. Ed. by Robert B. Todd ...

1

The fishes of Illinois / Stephen Alfred Forbes and Robert Earl Richardson.

2nd ed.

Contribuição para o conhecimento do pulgão Aphis nerii Boyer de Fonscolombe, 1841 (Homoptera, Aphididae)

This paper deals with the oleander aphid, Aphis nerii Boyer de Fonscolombe, 1841, a very common aphid at Piracicaba (State of São Paulo, Brazil).

A taxonomic revision of the genus Cnemidaria (Cyatheaceae) / Robert G. Stolze.

v. 37(1974)