\\ Species Tag: & 56003 & Name:& C-13-H3CH2CN \\ Version: & 2 & & Ethyl cyanide, \\ Date: & Jan. 1981 & &$^{13}$C isotope \\ Contributor:& R. L. Poynter & & on atom 3 \\ & & & \\ Lines Listed: & 1183 & Q(300.0)=& 115292.219 \\ Freq. (GHz) $<$ & 524 & Q(225.0)=& 73080.258 \\ Max. J: & 10 & Q(150.0)=& 40775.586 \\ LOGSTR0= & -9.0 & Q(75.00)=& 12977.773 \\ LOGSTR1= & -8.2 & Q(37.50)=& 4736.962 \\ Isotope Corr.: & -1.955 & Q(18.75)=& 1449.439 \\ Egy. (cm$^{-1}$) $>$& 0.0 & Q(9.375)=& 670.965 \\ $\mu_a$ = & 3.84 & A=& 27342.174 \\ $\mu_b$ = & 1.37 & B=& 4597.939 \\ $\mu_c$ = & & C=& 4133.707 \headend The experimental measurements were analyzed using the methods described in W.~H. Kirchhoff, 1972, J. Mol. Spect. {\bf 41}, 333, and W. H. Kirchhoff and D. R. Johnson, 1973, J. Mol. Spect. {\bf 45}, 159. The measurements were taken from H. M. Heise, H. Lutz, and H. Dreizler, 1973, Z. Naturforsch. {\bf 29a}, 1345. The dipole is an approximate value.