I'm guessing you mean the Missouri Association of Osteopathic Physicians and Surgeons. If so, here is their website: http://www.maops.org
The web address of the Museum Of Osteopathic Medicine is: www.atsu.edu/museum
The proper way to address a Doctor of Osteopathic Medicine (DO) (not Doctor of Osteopathy) is Doctor (Dr.) since they are medical physicians.
The address of the Museum Of Osteopathic Medicine is: 800 West Jefferson Street, Kirksville, MO 63501
The web address of the American Optometric Association is: http://www.aoa.org
The web address of the Landmarks Association Of Stl is: http://www.landmarks-stl.org
The web address of the Pony Express Historical Association is: www.stjoseph.net/ponyexpress
The address of the Watkins Mill Association is: , Lawson, MO 64062-8939
The address of the Northwest Missouri Steam And Gas Engine Association Inc is: Po Box 332, Hamilton, MO 64644-0332
The address of the Western Missouri Antique Tractor And Machinery Association I is: C/O Richard Griffith 43 E Main, Adrian, MO 64720
The address of the Old Jamestown Association is: Po Box 2223, Florissant, MO 63032-2223
The address of the Carroll County Genealogical Association is: 701 Ruby, Carrollton, MO 64633-1835
The address of the Lexington Library And Historical Association is: 112 S 13Th, Lexington, MO 64067