Unknown Author
F. Gerald Ham
R. Kenkman
Edward C. Kemp
ʻĀbid Sulaymān Mashūkhī
Edward C Kemp
A. I. Nikiforov
Marina Benedetti
Center for History of Physics (American Institute of Physics)
Anthony Taussig
Portugal. Biblioteca Nacional.
Pierpont Morgan Library
Tanis, Norman E.
Vladimir L. Uspenskiĭ
Jason Kalman