In the Halliday-Resnick textbooks, there is only mention of strength of a magnetic field, which in SI units is the derived unit Tesla. However, on my TI-89 and on more modern sources on the internet (including a Fuji-film PDF!), there is mention of the unit of the Oersted for magnetic field strength. The units of Tesla (and the related unit, Gauss) are reserved for something called "Magnetic Flux Density," which for reasons unknown to me is considered seperate. The unit for Magnetic Flux is, as usual, the Weber. So...does anyone have any information regarding the distinctions between these two quantities?