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Management is worried , however , because sales of these flagship products have been falling off the past few years . The results show that the method was successful at identifying a larger and more varied network membership than would have been identified using other methods . Although specific problems have been identified for physicians and nurses , the problems of social work in this substantive area have only recently been explored . All of the commands in this document may be executed using ordinary XWindows versions of Mathematica ( e.g ., on Suns ) provided the appropriate graphics windows have been initialized . The author explores some of the issues that have been identified through research as part of this complicated process . Employees who have been issued a Purchasing Card may initiate transactions in person , by telephone , or via the Internet , within the limits of the procedures . When another module wants to use those functions , it queries the core server , asking if modules those functions have been registered . More than 500 chemicals have been identified in tea . However , currently no plans or funding have been identified to correct communications equipment issues . There may have been changes within kinds , but they have n't varied since the beginning except for those that have become extinct .