Articles
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Filters: Author is Porter, D [Clear All Filters]
A headache chronicle: the daily recording of headaches and their correlates.. J Chronic Dis. 34(9-10):481-6.
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1981. Self-service computerized bibliographic retrieval: a comparison of Colleague and PaperChase, programs that search the MEDLINE data base.. Comput Biomed Res. 21(5):488-501.
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1988.