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\input{preface}
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\chapter{\formaldehyde observations of BGPS sources not previously observed with Arecibo}
\label{ch:h2colarge}
\section{Preface}
Given our success with the simple 4-hour GBT observation of $\sim20$ sources,
it was decided that a large-scale survey of BGPS sources accessible to Arecibo
and the GBT would be productive. We therefore selected 400 pointings in the
Arecibo-accessible declination range, 137 of which are in the outer galaxy
($172