TY  - BOOK
AU  - Urch,D.S.
TI  - Orbitals and symmetry,
T2  - Penguin library of physical sciences. Chemistry
SN  - 0140800980
U1  - 541.2 URC 
PY  - 1970///
CY  - Harmondsworth
PB  - Penguin
KW  - Molecular orbitals
KW  - Symmetry (Physics)
ER  -