TY  - BOOK
ED  - Syracuse University. Physics, Deptt.
TI  - Preprint series
U1  - 530.15 
PY  - 1967///
CY  - Syracuse
PB  - Univ.
KW  - Ladder operators
N1  - Komy, S. & o'Raifeartaigh, L.: On some properties of Ladder operators
ER  -