Hymenoptera of America north of Mexico : synoptic catalog, first supplement - Krombein, Karl V. (U.S. Dept. of Agriculture, 1958)

Hymenoptera of America north of Mexico : synoptic catalog, second supplement - Krombein, Karl V. (U.S. Dept. of Agriculture, 1967)

Hymenoptera Orientalis: or contributions to a knowledge of the Hymenoptera of the Oriental zoological region - Cameron, Peter, 1847 -1912 (Literary and Philosophical Society, 1900)

Hymenoptera texana - Cresson, E. T. (Ezra Townsend), 1838 -1926 (American Entomological Society, 1872)

The illustrated dictionary of gardening :a practical and scientific encyclopædia of horticulture for gardeners and botanists - Nicholson, George, 1847 -1908 (L.U. Gill, 1884)

The Illustrated dictionary of gardening : a practical and scientific encyclopaedia of horticulture for gardeners and botanists - Nicholson, George, 1847 -1908 (L. Upcott Gill, 1887)

Illustrierte Zeitschrift für Entomologie - Allgemeine Entomologische Gesellschaft. (J. Neumann, 1899)

Immatures of the solitary bee Camptopoeum friesei (Andrenidae, Panurginae, Panurgini) and of its cleptoparasite Parammobatodes minutus (Apidae, Nomadinae, Ammobatini) - Rozen, Jerome G. Jr. (Jerome George), 1928 - (American Museum of Natural History, 2009)

Die immergrünen Ziergëholze von Süd-Tirol - Entleutner, Anton. (M. Huttler, 1891)

In bird land - Keyser, Leander S. (Leander Sylvester), 1856 -1937 (A. C. McClurg and company, 1894)

In bird land - Keyser, Leander S. (Leander Sylvester), 1856 -1937 (A. C. McClurg and company, 1897)

In bird land - Keyser, Leander S. (Leander Sylvester), 1856 -1937 (A. C. McClurg and Co, 1896)

In a Gloucestershire garden - Ellacombe, Henry Nicholson, 1821 -1916 (E. Arnold, 1896)

In a Gloucestershire garden - Ellacombe, Henry Nicholson, 1821 -1916 (Arnold, 1896)

In northern mists; Arctic exploration in early times - Nansen, Fridtjof, 1861 -1930 (Frederick A. Stokes co, 1911)

Index to information on insects associated with western wildland shrubs - Nelson, David L. (U.S. Dept. of Agriculture, Forest Service, Intermountain Research Station, 1988)

An index to the scientific contents of the Journal and Proceedings of the Academy of Natural Sciences of Philadelphia [1817-1910] Published in commemoration of the centenary of the academy, March 21, 1912 - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences, 1912)