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frederick m laing
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The cockroach
Frederick M. Laing · Printed by order of the Trustees of the British museum
24 sayfa · 1946
Cockroaches
Maple research
M. F. Morselli, Frederick M. Laing · Vermont Agricultural Experiment Station, University of Vermont
13 sayfa · 1979
Proctor Maple Research Farm
The use of plastic tubing in gathering maple sap
Frederick M. Laing, Mary G. Lighthall, James W. Marvin · Vermont Agricultural Experiment Station
11 sayfa · 1960
Maple sugar industry / Equipment and supplies