TY  - BOOK
AU  - Roberts,H.J.
TI  - Difficult diagnosis
SN  - 0721634818
AV  - RC71  .D54 1992
U1  - 616.075 
PY  - 1992///
CY  - Philadelphia
PB  - Saunders
KW  - Diagnosis
N1  - includes Bibliography
ER  -