Ford, L.R.
Flows in networks
Princeton University Press, 1962
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L`Amour, Louis
The key-lock man
Bantam Book, 1965
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Egan, William F.
Frequency synthesis/ Phase Lock
John Wiley & Sons, 1981
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Kihara, Taro
Intermolecular forces
John Wiley & Sons, 1978
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Dewi Anggraeni
Parallel forces
Indra Pub, 1988
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