TY  - BOOK
AU  - Cottrell,T.L.
TI  - The strengths of chemical bonds
T2  - Butterworths scientific publications
U1  - 541.39 
PY  - 1958///
CY  - London
PB  - Butterworths Scientific Publications
KW  - Chemistry, Physical and theoretical
KW  - Valence
ER  -