Michael Haydn's Symphony No. 13 in D major, Perger 37, Sherman 13, MH 132, believed to have been written in Salzburg in 1768, was at one time mistaken for a symphony by Joseph Haydn (Hob. I:D26).
As part of the Bournemouth Sinfonietta complete series of Haydn's symphonies conducted by Harold Farberman, an LP containing Symphony No. 13 (misidentified as Symphony No. 14) coupled with Haydn's Symphony No. 4 was released in 1984 on Vox Cum Laude – D-VCL 9086.
References
A. Delarte, "A Quick Overview Of The Instrumental Music Of Michael Haydn" Bob's Poetry Magazine November 2006: 33 - 34 PDF
Charles H. Sherman and T. Donley Thomas, Johann Michael Haydn (1737 - 1806), a chronological thematic catalogue of his works. Stuyvesant, New York: Pendragon Press (1993)
C. Sherman, "Johann Michael Haydn" in The Symphony: Salzburg, Part 2 London: Garland Publishing (1982): lxv