TY  - BOOK
AU  - Aston,Francis William
AU  - Isopes,
ED  - Robert Boyle lecture, 1924
TI  - Mass spectra and isotopes
U1  - 239.74 
PY  - 1948///
CY  - London
PB  - Edward Arnold
KW  - Isotopes
KW  - Atomic weights
KW  - Spectrum analysis
ER  -