The paper doesn't specifically talk about galactic rotation, but it does demonstrate the measurement of velocities via the Doppler shift. Take a look at the pl

The paper doesn't specifically talk about galactic rotation, but it does demonstrate the measurement of velocities via the Doppler shift. Take a look at the plot on pg. 12, that shows "a 'triple humped' spectral structure, indicating that at the time of the observation, there were three distinct hydrogen clouds within the field-of-view of the radio telescope." I'll correct the title.