كتب ذات صلة

Useful birds and their protection : containing brief descriptions of the more common and useful species of Massachusetts, with accounts of their food habits, and a chapter on the means of attracting and protecting birds

Principles of economic zoölogy

Poisonous snakes of the world : a manual for use by the U. S. amphibious forces

The pests of the farm being an account of the various depredating animals, birds, and insects which annoy the American farmer.

• Schlangenkunde.
  المؤلفون: Lenz, Harald Othmar
• Prof. Dr. Harald O. Lenz'' Ntzliche, schdliche und verdchtige Pilze.
  المؤلفون: Lenz, Harald Othmar ,  Wnsche, Otto
• Gemeinn�utzige Naturgeschichte.
  المؤلفون: Lenz, Harald Othmar

• Umschau auf dem landwirtschaftlichen Gebiete des Thüringer Waldes im Herzogthum Gotha.
  المؤلفون: Frank, Dorotheus
• Schlangen und Schlangenfeinde
  المؤلفون: Lenz, Harald Othmar