%0 Journal Article %T A general method for differentiation of vectors in orthogonal systems of coordinates %A Koo, W. K. %A Liew, Y. C. %J American Journal of Physics %V 57 %N 12 %P 1118-1120 %@ 0002-9505 %D 1989-12-01 %I American Association of Physics Teachers %~ DeepDyve