TY  - BOOK
AU  - Lang, Johannes G
TI  - The magnetic field
T2  -  	Programmed instruction, 3
SN  - 3800940078
AV  - QC793.3M3 LAN
PY  - 1978///
CY  - London : 
PB  - Heyden, 
KW  -  	     Magnetic fields
N1  - includes appendix
ER  -