Cartmell, E., & Fowles, G. W. A. (1977). Valency and molecular structure (4th ed.). Butterworths.
Chicago-čujuhus (17. p.)Cartmell, E., juo G. W. A. Fowles. Valency and Molecular Structure. 4th ed. London: Butterworths, 1977.
MLA-čujuhus (9. p.)Cartmell, E., juo G. W. A. Fowles. Valency and Molecular Structure. 4th ed. Butterworths, 1977.
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