RT Journal Article SR Electronic T1 Germ cells and genital ridges. JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 708 OP 708 DO 10.1136/adc.45.243.708-a VO 45 IS 243 A1 Rushton, D I YR 1970 UL http://adc.bmj.com/content/45/243/708.1.abstract AB