  The sub-natural-width $N$-type resonance in {\Lambda}-system, on the $D_2$
line of Cs atoms is studied for the first time in the presence of a buffer gas
(neon) and the radiations of two continuous narrow band diode lasers. $L$ = 1
cm long cell is used to investigate $N$-type process. The $N$-type resonance in
a magnetic field for $^{133}$Cs atoms is shown to split into seven or eight
components, depending on the magnetic field and laser radiation directions. The
results obtained indicate that levels $F_g$ = 3, 4 are initial and final in the
N resonance formation. The experimental results with magnetic field agree well
with the theoretical curves.
