C. Control of data -- Control of the data is accomplished by use 

 of a card file of bibliographic sources, a tally card file, and a log 

 book of sources coded and keyed to bibliographic and data cards. 



The bibliographic file is a complete record of all sources, published 

 and unpublished, from which data have been obtained. Each biblio- 

 graphic card contains the complete bibliographic citation including the 

 library which owns the reference; the ship, expedition, or operation 

 which collected the samples; the date of the survey; the bibliographic 

 code number; alist of cross references; and certain pertinent comments. 

 The comments usually indicate the number and types of samples 

 reported in the source and the numbers of the 10-degree Marsden 

 squares in which the data are filed. The cross references are kept to a 

 minimum and key the geographic area (sea, gulf, bay, etc.) of the survey 

 (unless it is worldwide or oceanwide), the ship or ships, expedition, 

 operation code names, and author(s) of the report to the bibliographic 

 card. When small station location or sediment distribution charts 

 appear in the sources, reduced copies are made and fastened to the 

 bibliographic card. 



The library from which the source publication was obtained is 

 indicated on the card (preceding the call number) as follows: NAV 

 OCEANO - Naval Oceanographic Office, USCGS - U. S. Coast and 

 Geodetic Survey, LC - Library of Congress, USGS - U. S. Geological 

 Survey, DI - Department of the Interior, SI - Smithsonian Institution 

 (National Oceanographic Data Center, WB - Weather Bureau, DA - 

 Department of Agriculture, and WHOI (Woods Hole Oceanographic 

 Institute). 



The bibliographic cards are filed alphabetically by name of the 

 survey ship and cruise number; e.g., VEMA-6 follows VEMA-5. If 

 the ship is not given, then the expedition, cruise, or operation name is 

 used, e.g., Capricorn Expedition, DEEP FREEZE (operation), AMOS 

 (project). If none oftheseis given, then the cards are filed alphabetically 

 by senior author or occasionally by geographic area name if the source 

 deals with a limited area such as the Sea of Azov. 



The purposes of the bibliographic file are: 



1. To direct users of data to the original source for information 

 not supplied by the data card. 



2. To prevent duplication of data by indicating if recently acquired 

 data or sources already have been filed. 



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