\documentclass{paastex}
\usepackage{myemulateapj5}
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\title{On the Origin of HI in Galaxies:}
\title{The Sizes and Masses of HI}
\title{Photodissociation Regions}
\author{Ronald J.\ Allen}
\affil{Space Telescope Science Institute}
\affil{3700 San Martin Drive}
\affil{Baltimore, MD 21218}
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\centerline{\titlelarge Invited paper to be published in the proceedings of}
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\centerline{\titlelarge\em The Dynamics, Structure and History of Galaxies,}
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\centerline{\titlelarge held 30 July--2 August, 2001 at Dunk Island, Australia;}
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\centerline{\titlelarge G.~S.\ Da Costa and E.~M.\ Sadler, eds., ASP.}
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\end{document}