TY - JOUR
AU - Richard McCray
BT - nature physical science
DA - 06/1973
DO - 10.1038/physci243094b0
N1 - <p>JILA Pub. 989</p>
PY - 1973
SP - 94
EP - 96
T2 - nature physical science
TI - The 35-day Periodicity of Hercules X-1
UR - http://www.nature.com/nature-physci/journal/v243/n128/pdf/physci243094b0.pdf
VL - 243
ER -