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APA Citation
Lubyako, D., Martinez-Piedra, G., Ushenin, A., Denvir, P., Dunlop, J., Hall, A., Le Roux, G., van Someren, L., & Weinberger, H. (n.d.). understanding the Doppler effect by analysing spectrograms of the sound of a passing vehicle. Physics education, 52, . http://access.bl.uk/ark:/81055/vdc_100087553746.0x000057