海外直订Pig Breeds and Their Characteristics - A Collection of Articles on Berkshires, t 猪品种及其特征——关于伯克

海外直订医药图书Pigs: Breeds and Management: With a Chapter on Diseases of the Pig 猪:品种和管理:附猪的疾病一章

海外直订Breeds of Hogs: Bulletin No. 124 猪的品种：公告第124号

海外直订Swine Houses and Equipment; Types and Breeds of Swine; Swine Feeding and Judging 猪舍及设备;猪的种类和品种;

海外直订Saving the Guinea Hogs: The Recovery of an American Homestead Breed 拯救几内亚猪:美国本土品种的恢复