... clumps

Appendix A is only available in electronic form at http://www.aanda.org

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...1,

Present address: Harvard-Smithsonian Centre for Astrophysics.

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... telescope

IRAM is an international institute for research in millimeter astronomy. IRAM is supported by INSU/CNRS (France), MPG (Germany) and IGN (Spain).

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... telescope

Based on observations with the 100 m telescope of the MPIfR(Max-Planck-Institut für Radioastronomie) at Effelsberg).

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... given

Table A.2, available in electronic form, contains the following information. Column 1 lists the name of the source, Cols. 2 and 5 gives the ${\rm NH_3}$ (1, 1) and (2, 2) main beam brightness temperature respectively, Col. 3 gives the (1, 1) line width, and Col. 4 lists the (1, 1) main group optical depth. In Table A.3 we list the sources observed in ${\rm NH_{2}D}$, the integrated line intensity, FWHM of the line and the total optical depth from Cols. 1 to 4.

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...

Table A.4, available in electronic form, contains the following information. Column 1 lists the name of the source, Cols. 2 and 3 gives the ${\rm C^{18}O}$ (1-0) and (2-1) integrated intensity.

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