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	1.	Experience with a commercial kit for the radioisotopic assay of vitamin B12 in serum: the Phadebas B12 test. [electronic resource] by Raven, J L Robson, M B Producer: 19740605 In: Journal of clinical pathology vol. 27 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	2.	Extraction of serum vitamin B12 for radio-isotopic and Lactobacillus leichmannii assay. [electronic resource] by Raven, J L Robson, M B Producer: 19751108 In: Journal of clinical pathology vol. 28 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	3.	Underestimation of vitamin B 12 in serum by a microbiological method(Lactobacillus leichmannii): comparison with a radioisotopic method. [electronic resource] by Raven, J L Robson, M B Barkhan, P Producer: 19700302 In: Journal of clinical pathology vol. 22 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	4.	The effect of cyanide, serum and other factors on the assay of vitamin B12 by a radio-isotope method using 57CoB12, intrinsic factor and coated charcoal. [electronic resource] by Raven, J L Robson, M B Walker, P L Barkhan, P Producer: 19681120 In: Guy's Hospital reports vol. 117 Availability: No items available. Save to lists Add to cart (remove)
	5.	Improved method for measuring vitamin B12 in serum using intrinsic factor, 57CoB12, and coated charcoal. [electronic resource] by Raven, J L Robson, M B Walker, P L Barkhan, P Producer: 19690515 In: Journal of clinical pathology vol. 22 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	6.	Comparison of three methods for measuring vitamin B 12 in serum: radioisotopic, euglena gracilis and Lactobacillus leichmannii. [electronic resource] by Raven, J L Robson, M B Morgan, J O Hoffbrand, A V Producer: 19720428 In: British journal of haematology vol. 22 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)