  We have investigated electromagnetically induced transparency in the spectrum
of selective reflection at the interface of Rb atom vapors and a dielectric
nanocell window. A nanocell with atomic vapor column thicknesses ranging from
150 to 1200 nm, as well as a 50~$\mu$m thickness microcell were used. We have
compared electromagnetically induced transparency observed for the cases of the
selective reflection and transmission. It was demonstrated that for the
thicknesses of below $\leq 1000$ nm selective reflection technique is more
favorable. In contrast, for wider cells and microcells, using transmitted
radiation as probe field is more effective.
