A 2006 report by a joint taskforce between the American Physical Society and the American Association of Physics Teachers found that 76 of the 80 physics departments surveyed require a first-year graduate course in John Jackson 's Classical Electrodynamics. This made Jackson's book the most popular textbook in any field of graduate-level physics, with Herbert Goldstein 's Classical Mechanics as the second most popular with adoption at 48 universities. James Russ professor of physics at Carnegie Mellon University claims Jackson's textbook has been "[t]he classic electrodynamics text for the past four decades" and that it is "the book from which most current-generation physicists took their first course." Except Jackson's textbook there are other classic textbooks like Classical Electricity and Magnetism by Pief Panofsky and Melba Phillips, and Electrodynamics of Continuous Media by Lev Landau, Evgeny Lifshitz, and Lev Pitaevskii that both of these books originally published before Jackson's book. Among the textbooks that published after Jackson's book, Julian Schwinger 's 1970s lecture notes is a mentionable book that first published in 1998 after Schwinger's death. Due to the domination of Jackson's textbook in graduate physics education, even physicist like Schwinger became frustrated competing with Jackson and because of this, the publication of Schwinger's book was postponed until after his death so that it was finally completed and published by his colleagues.