Conservation of marine birds of northern North America : papers from the international symposium held at the Seattle Hyatt House, Seattle, Washington, 13-15 May 1975 Q Science
Some apostles of physiology; being an account of their lives and labours, labours that have contributed to the advancement of the healing art as well as to the prevention of disease Q Science
Vorträge über botanische Stammesgeschichte, gehalten an der Reichsuniversität zu Leiden. Ein Lehrbuch der Pflanzensystematik Q Science
The uses and triumphs of mathematics : its beauties and attractions popularly treated in the language of everyday life Q Science
