\begin{table}%t3 \vspace*{-1.5mm} %\centering \par \caption{\label{tab:literature_obs}Literature sources for the sub-mm/mm data. } \vspace*{-1.5mm} \begin{tabular}{cc} \hline \hline \noalign{\smallskip} $\lambda$ (mm) & Source references \\ \hline 0.450 & 1 \\ 0.600 & 2, 3 \\ 0.624 & 4 \\ 0.769 & 4 \\ 0.800 & 2, 3 \\ 0.850 & 1, 5 \\ 0.880 & 5 \\ 1.056 & 4 \\ 1.100 & 2, 3 \\ 1.200 & 6 \\ 1.300 & 1, 7, 8, 9, 10 \\ 1.330 & 5 \\ 2.000 & 2, 11 \\ 2.700 & 7, 8, 12, 13 \\ 3.100 & 8 \\ 3.400 & 9, 14 \\ 7.000 & 15\\ \hline \end{tabular} \vspace*{-1.5mm} \tablebib{(1) Andrews \& Williams (\cite{And05}); (2)~Mannings \& Emerson (\cite{Man94}); (3)~Adams et~al. (\cite{Ada90}); (4)~Beckwith \& Sargent (\cite{Bec91}); (5)~Andrews \& Williams (\cite{And07}); (6)~Althenoff et~al. (\cite{Alt94}); (7)~Dutrey et~al. (\cite{Dut96}); (8)~Jensen et~al. (\cite{Jen96}); (9)~Koerner et~al. (\cite{Koe95}); (10)~Isella et~al. (\cite{Ise09}); (11)~Kitamura et~al. (\cite{Kit02}); (12)~Mundy et~al. (\cite{Mun96}); (13)~Schaefer et~al. (\cite{Sch09}); (14)~Ohashi et~al. (\cite{Oha96}); (15)~Rodmann et~al. (\cite{Rod06}).} \vspace*{-2.5mm} \end{table}