Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn Q Science
Homes without hands. Being a description of the habitations of animals, classed according to their principle of construction Q Science
Two new species of marsupial frogs (Anura: Hylidae: Gastrotheca) from the Cordillera Oriental in central Peru Q Science
A history of physics in its elementary branches, including the evolution of physical laboratories Q Science
