TY  - RPRT
TI  - Orbital variability in the eclipsing pulsar binary PSR B1957+20
AU  - Arzoumanian, Z.
AU  - Fruchter, A. S.
AU  - Taylor, J. H.
PY  - 1994
UR  - https://ntrs.nasa.gov/citations/19950036387
ID  - 19950036387
ER  -