TY  - BOOK
AU  - VanSpronsen, J. W.
TI  - Periodic system of chemical elements ; history of the first hundred years /by J. W. VanSpronsen
SN  - SBN : 444407766
U1  - 540.212 
PY  - 1969///
CY  - Amsterdam
PB  - Elsevier
ER  -