Mucopolysaccaridosis IV (Morquio Syndrome) , in Heritable Disorders of Connective Tissue
(Ed) 4th Ed, The C. V. Mosby Co, St. Louis, p. 583, McKusick,V.A., 1972
Morquio's Disease, A Radiologic & Morphologic Study
Pediatrics 34:839-850, Schenk,E.A.&Haggerty,J., 1964