RT Journal Article SR Electronic T1 Offspring sex ratio as an indicator of reproductive hazards associated with pesticides. JF Occupational and Environmental Medicine JO Occup Environ Med FD BMJ Publishing Group Ltd SP 429 OP 430 DO 10.1136/oem.52.6.429-a VO 52 IS 6 A1 W H James YR 1995 UL http://oem.bmj.com/content/52/6/429.2.abstract AB