Agricultural College of Pennsylvania

http://www.worldcat.org/oclc/34242216

http://www.worldcat.org/oclc/32829547

http://www.worldcat.org/oclc/34712812

http://www.worldcat.org/oclc/704272350

http://www.worldcat.org/oclc/32080260

http://www.worldcat.org/oclc/32171978

http://www.worldcat.org/oclc/32171906

http://www.worldcat.org/oclc/32871444

http://www.worldcat.org/oclc/32075599

http://www.worldcat.org/oclc/32474211

http://viaf.org/viaf/140034946

http://www.worldcat.org/oclc/33195616

http://www.worldcat.org/oclc/32295925

http://www.worldcat.org/oclc/32080162

http://www.worldcat.org/oclc/32075628

http://www.worldcat.org/oclc/32075600

http://www.worldcat.org/oclc/32080140

http://www.worldcat.org/oclc/754863460

http://www.worldcat.org/oclc/32075604

http://www.worldcat.org/oclc/32871464

http://www.worldcat.org/oclc/607090940

http://www.worldcat.org/oclc/32829686

http://www.worldcat.org/oclc/36348965

http://www.worldcat.org/oclc/33195518

http://www.worldcat.org/oclc/32080130

http://www.worldcat.org/oclc/32075616

http://www.worldcat.org/oclc/32080267

http://www.worldcat.org/oclc/32080354