TY  - BOOK
AU  - Helszajn,J.
TI  - Waveguide junction circulators: theory and practice 
SN  - 0471982520
PY  - 1998///
CY  - Chichester
PB  - John Wiley and Sons
KW  - Circulators, Wave-guide
KW  - Junctions, Wave-guide
N1  - Includes bibliographical references and index
ER  -