1.
Ned Tijdschr Geneeskd
; 111(51): 2319-27, 1967 Dec 23.
Article
in Dutch
| MEDLINE
| ID: mdl-6080348
2.
Arch Dis Child
; 42(225): 532-42, 1967 Oct.
Article
in English
| MEDLINE
| ID: mdl-4294013