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	1.	Epileptics in mining. [electronic resource] by Halen, R J Producer: 19830715 In: Journal of occupational medicine. : official publication of the Industrial Medical Association vol. 25 Availability: No items available. Save to lists Add to cart (remove)
	2.	Low-back pain in industry. [electronic resource] by HALEN, R J Producer: 19981101 In: Minnesota medicine vol. 45 Availability: No items available. Save to lists Add to cart (remove)
	3.	The comparability of chest x-ray interpretations and pulmonary function test results by different observers. [electronic resource] by Halen, R J Producer: 19790212 In: Journal of occupational medicine. : official publication of the Industrial Medical Association vol. 20 Availability: No items available. Save to lists Add to cart (remove)
	4.	Commentary: the Criteria Document for Coke Oven Emissions. [electronic resource] by Halen, R J Producer: 19731114 In: Journal of occupational medicine. : official publication of the Industrial Medical Association vol. 15 Availability: No items available. Save to lists Add to cart (remove)
	5.	Cardiac problems in industry. [electronic resource] by HALEN, R J Producer: 20000701 In: Pennsylvania medical journal (1928) vol. 62 Availability: No items available. Save to lists Add to cart (remove)
	6.	Etiological considerations in spondylolysis and spondylolisthesis. [electronic resource] by HALEN, R J Producer: 19981101 In: Journal of occupational medicine. : official publication of the Industrial Medical Association vol. 5 Availability: No items available. Save to lists Add to cart (remove)