Variation of the field

Evolutionary history of field mice (Murinae: Apodemus), with emphasis on morphological variation among species in China and description of a new species. Zoological

Influence Over Past Climates and Geomagnetic Field, Proceedings of the AGU Chapman Conference: Mechanisms of Millennial Scale Global Climate Change, 1999

Seasonal Variation in Lepidoptera Ent. News. 55 (4): 91 Hodges, 1983 Check List of the Lepidoptera of America North of Mexico Check List Lep. Am. N of Mexico

Applications in Mechanics and Field Theory. Springer-Verlag. 2016. ISBN 978-94-6239-171-0.  Noether, Emmy. Invariant Variation Problems. Transport Theory

Photos （页面存档备份，存于互联网档案馆） Flicker Field Guide Birds of the World Photographs Red-necked Grebe videos （页面存档备份，存于互联网档案馆） on the Internet Bird Collection