Subjects: *VISION; *FLEAS; *ZOOLOGICAL modelsSCIENTIFIC American (Periodical)
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Subjects: HOUSEHOLD appliances; PRICES; ECONOMIC competitionUNITED States
Subjects: *ELECTRIC meter design & construction; *ELECTRICITY; *HOUSEHOLD appliance design & construction
Subjects: HOUSEHOLD appliances; ENERGY storage; ELECTRIC power supplies to apparatusTELKES, Maria, 1900-1995