TY  - BOOK
AU  - Colledge, N. R.
AU  - Walker, B. R. 
AU  - Ralston, S. H.
TI  - Davidson's  Principles and Practice of Medicine 
SN  - 9780702030857
U1  - 616 20th 
PY  - 2010///
CY  - New York 
PB  - Churchill livingstone Elsevier
KW  - Medicine
KW  - Diseases
ER  -