Popular lectures on scientific subjects Helmholtz, Hermann von, 1821-1894 creator Atkinson, E. ed. and tr. contributor text book New York D. Appleton 1873 1873
print
ENG Science Q171 .H5 1873a https://www.biodiversitylibrary.org/bibliography/29497 1199519 16023997 10.5962/bhl.title.29497 SNN