Add periods to degree initialisms

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 			<p>“If those Fuzzies are sapient beings, that whole setup down there is illegal. Company, Colonial administration and all,” he said. “Zarathustra’s a Class-<span epub:type="z3998:roman">IV</span> planet, and that’s all you can make out of it.”</p>
 			<p>“We won’t intervene unless we’re forced to. Pancho, I think the decision will be largely up to you.”</p>
 			<p>Pancho Ybarra was horrified.</p>
-			<p>“Good God, Alex! You can’t mean that. Who am I? A nobody. All I have is an ordinary <abbr class="degree">MD</abbr>, and a <abbr class="degree">PsychD</abbr>. Why, the best psychological brains in the Federation⁠—”</p>
+			<p>“Good God, Alex! You can’t mean that. Who am I? A nobody. All I have is an ordinary <abbr class="degree">M.D.</abbr>, and a <abbr class="degree">Psych. D.</abbr>. Why, the best psychological brains in the Federation⁠—”</p>
 			<p>“Aren’t on Zarathustra, Pancho. They’re on Terra, five hundred light-years, six months’ ship voyage each way. Intervention, of course, is my responsibility, but the sapience question is yours. I don’t envy you, but I can’t relieve you of it.”</p>
 			<hr/>
 			<p>Gerd van Riebeek’s suggestion that all three of the visitors sleep aboard the airboat hadn’t been treated seriously at all. Gerd himself was accommodated in the spare room of the living hut. Juan Jimenez went with Ben Rainsford to his camp for the night. Ruth Ortheris had the cabin of the boat to herself. Rainsford was on the screen the next morning, while Jack and Gerd and Ruth and the Fuzzies were having breakfast; he and Jimenez had decided to take his airjeep and work down from the head of Cold Creek in the belief that there must be more Fuzzies around in the woods.</p>

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 			<p>However, it was Ben Rainsford’s airjeep, with a zebralope carcass lashed along one side. It circled the Kellogg camp and then let down quickly; Rainsford jumped out as soon as it was grounded, his pistol drawn.</p>
 			<p>“What happened, Jack?” he asked, then glanced around, from Goldilocks to Kellogg to Borch to the pistol beside Borch’s body. “I get it. Last time anybody pulled a gun on you, they called it suicide.”</p>
 			<p>“That’s what this was, more or less. You have a movie camera in your jeep? Well, get some shots of Borch, and some of Goldilocks. Then stand by, and if the Fuzzies start doing anything different, get it all. I don’t think you’ll be disappointed.”</p>
-			<p>Rainsford looked puzzled, but he holstered his pistol and went back to his jeep, returning with a camera. Mallin began insisting that, as a licensed <abbr class="degree">MD</abbr>, he had a right to treat Kellogg’s injuries. Gerd van Riebeek followed him into the living hut for a first-aid kit. They were just emerging, van Riebeek’s automatic in the small of Mallin’s back, when a constabulary car grounded beside Rainsford’s airjeep. It wasn’t Car Three. George Lunt jumped out, unsnapping the flap of his holster, while Ahmed Khadra was talking into the radio.</p>
+			<p>Rainsford looked puzzled, but he holstered his pistol and went back to his jeep, returning with a camera. Mallin began insisting that, as a licensed <abbr class="degree">M.D.</abbr>, he had a right to treat Kellogg’s injuries. Gerd van Riebeek followed him into the living hut for a first-aid kit. They were just emerging, van Riebeek’s automatic in the small of Mallin’s back, when a constabulary car grounded beside Rainsford’s airjeep. It wasn’t Car Three. George Lunt jumped out, unsnapping the flap of his holster, while Ahmed Khadra was talking into the radio.</p>
 			<p>“What’s happened, Jack? Why didn’t you wait till we got here?”</p>
 			<p>“This maniac assaulted me and murdered that man over there!” Kellogg began vociferating.</p>
 			<p>“Is your name Jack too?” Lunt demanded.</p>