68298223
9781017659337
Lavarack, Frederick Charles is the author of 'Locking : Being an Elementary Treatise on the Mechanisms in Interlocking Lever Machines by Which the Movements of the Levers Are Restricted to Certain Predetermined Ways, Rendering It Impossible to Operate Conflicting Switches and Signals on Railways', published 2022 under ISBN 9781017659337 and ISBN 1017659338.
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