TY  - BOOK
AU  - NCERT
TI  - Biology: textbook for class xi
SN  - 8174504966
U1  - 570 B521 
PY  - 2006///
CY  - New Delhi
PB  - NCERT
KW  - Biology
KW  - Plant physiology
KW  - Human physiology
KW  - Cell
KW  - structure
ER  -