We consider the works of K.S. Shifrin devoted to development and applications of the rigid and approximate methods to solve the problem of light scattering by small particles. We discuss the impact of his book “Scattering of light in a turbid medium” and five volumes of “Tables of light scattering”. We note his papers on light scattering by very large and very small particles, particles with the refractive index m close to 1, core-mantle particles and particles with m continuously changing along the radius, as well as some other papers related to solution of the direct tasks in light scattering.