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By excluding from this sample anyone who had participated in the Web questionnaires we would achieve the necessary balance we were looking for : the demographics of the two cohorts ( Web respondents and paper respondents ) could be compared with the demographics of the course as a whole to determine whether or not we could claim to have obtained views from an appropriate cross-section of students . Save time by employing easy-to-use check-writing and accounting software , but keep paper copies of receipts , invoices , and checks . The current banknote paper Social Security card incorporates security features appropriate to a paper format . The paper appeared in the Aug. 25 issue of Nature . Those not yet on the web are available in paper format from the relevant Department ( and in these cases the link to programme information is shown ) . Historical Annual Reports Collection : This collection at the Angelo Bruno Business Library at the University of Alabama includes paper copies of corporate annual reports from 1,900 companies , from the late nineteenth century to 1980 . The paper appeared Aug. 5 online in the journal Stem Cells . Additionally , the policy should designate where copies of an EHR may be printed in an organization coupled with methods to control or dispose of paper copies immediately following authorized use . E-mail in this category may be retained in electronic or paper form ( the latter may in some cases be the only means of providing for archival retention , for example through microfilming of paper copies ) , but must be retained for as long as the period specified in a valid records schedule . Sending paper copies of call slips to them for material retrieval does n't work very well in those situations . A model of industry and academic synergy , ESPRI investigates fundamental aspects of pulping , papermaking , and paper physics , including chlorine-free bleaching , properties of papermaking materials , paper structural characteristics , and printability .