418 A.2d 1241 JAMES ARTHUR CALHOUN v. STATE OF MARYLAND. No. 1438, September Term, 1979.Court of Special Appeals of Maryland. Decided September 8, 1980. CRIMINAL LAW — STATUTES — SENTENCE — Under Habitual Offender Act — Art. 27, § 643B — Mandatory Sentencing — Predicate Prior Conviction — Juvenile Conviction Under Federal Youth Corrections Act […]