The number of linear, directed, rooted, and connected graphs
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 Trans. Amer. Math. Soc. 78 (1955), 445463 Request permission
References

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Additional Information
 © Copyright 1955 American Mathematical Society
 Journal: Trans. Amer. Math. Soc. 78 (1955), 445463
 MSC: Primary 56.0X
 DOI: https://doi.org/10.1090/S00029947195500681982
 MathSciNet review: 0068198