Handbook of flower pollination based upon Hermann Müller's work The fertilisation of flowers by insects - Knuth, Paul, 1854 -1899 (Clarendon press, 1909)

Handbook of instructions for collectors - British Museum (Natural History) (Printed by order of the Trustees [by Hazell, Watson and Viney, ld.], 1902)

Handbook of instructions for collectors - British Museum (Natural History) (Printed by order of the Trustees [by Hazell, Watson and Viney, ld.], 1904)

Handbook of instructions for collectors - British Museum (Natural History) (Printed by order of the Trustees [by Hazell, Watson and Viney, ld.], 1906)

Handbook of zoology - Hoeven, Jan van der, 1801 -1868 (University Press, 1856)

Handbook of zoology - Clark, William, 1788 -1855 (Longman, Brown, Green, Longmans, and Roberts, 1856)

Handbuch der Blütenbiologie, unter Zugrundelegung von Herman Müllers Werk: "Die Befruchtung der Blumen durch Insekten." - Knuth, Paul, 1854 -1899 (W. Engelmann, 1898)