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CONTENTdm, along with all of OCLC's services, will be down approximately 15 hours for a system upgrade. This will occur from 9:00pm PST on Friday, January 2, to around noon on Saturday, January 3.


One of the propagation baskets with the bottom still submerged and photographed from directly above. Owing to disturbance of the water supply the young mussels, as shown by their trails, have migrated considerably. Such migrations apparently do not occur

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