TY  - BOOK
AU  - Nielsen, JR
AU  - Rudinger, E
TI  - Niels bohr: collected works vol.4
SN  - 9780444532886
U1  - 53(08) 
PY  - 1977///
CY  - Amsterdam
PB  - North-Holland
KW  - NIELS BOHR
KW  - PERIODIC SYSTEM
N1  - Volume 4: the periodic system(1920-1923),library has all the volumes. (Ref. sec)
ER  -