Part,  Chapter, Paragraph
1   II,     9.  2.  7| Johnson A, Alderdice F, Petty T, Macfarlane A (1996):
2   II,     9.  3.  1| Johnson A, Alderdice F, Petty T, Macfarlane A (1996):
3   II,     9.  5.  6| Johnson A, Alderdice F, Petty T,Macfarlane A (1996): Birthweight