Letters to the Editor

Dougherty R C Whitaker M J Tang S-Y Bottcher R Keller M Kuehl D W (1980) In: The Chemistry of Environmental Agents as Human Health Hazards. Ed. McKinney J D . Ann Arbor Science Publishers Inc, Ann Arbor, Michigan

James W H (1980) Andrologia 12, 381–388

Mann T Lutwak-Mann C (1981) Male Reproductive Function and Semen. Springer Verlag, New York

Hayes W J (1982) Pesticides Studied in Man. Williams & Wilkins, London

Dandona P Marshall N J Bidey S P Nathan A W Havard C W H (1979) British Medical Journal i, 374–377

Dandona P Nathan A W Marshall N J Bidey S P Havard C W H (1980) In: Proceedings of VIII International Thyroid Congress, Sydney, Australia. Ed. Stockigt J R . Australian Academy of Science, pp. 583–586

Glinoer D Schrooyen M Sand G Winand R (1984) Annals of Endocrinology 45, 13

Kelly W Longson D Smithard D (1983) Clinical Endocrinology 18, 485

Somers J S A Irvine W J Toft A D Urbainak S J Donaldson A A (1981) Journal of Clinical and Laboratory Immunology 6, 245

Yamamoto K Saito K Takai T Yashida S (1983) Progress in Clinical and Biological Research 113, 189

Brabant G Peter H Becker H (1984) Lancet i, 515–516

Howlett T A Lawton N F Fells P Besser G M (1984) Lancet ii, 1101

Weetman A P McGregor A M Ludgate M (1983) Lancet ii, 486–489

Tinker J (1981) British Journal of Hospital Medicine 25, 83–84

MacIntosh A F Crabb M E Brennan H Williams J H Chamberlain D A (1979) British Medical Journal i, 511–513

Engeset A Kristiansen K (1953) In: Modern Trends in Diagnostic Radiology (Second Series). Ed. McLaren J W . Butterworth and Co, London; chapter 20

Sutton D (1962) Arteriography. E and S Livingstone, Edinburgh and London; chapter 5