求高清spring和google图书一本《Sample Survey Theory  Some Pythagorean Perspectives》
链接：
http://link.springer.com/book/10.1007/978-0-387-21764-2/page/1

http://books.google.com.hk/books?id=gRcQHnBrjE4C&printsec=frontcover&dq=Sampling+Survey&hl=zh-CN&sa=X&ei=7lA8Uq3DM8u0iQfliYDIDw&ved=0CG4Q6AEwCA#v=onepage&q=Sampling%20Survey&f=false