| title | creator | language | description | tableOfContents | contributor | subject | created |
| Evolution
An Investigation and a Critique | Graebner, Theodore, 1876-1950 | en | | | | | 2006-09-18 |
| Joyce's Investments
A Story for Girls | Newberry, Fannie E. (Fannie Ellsworth), 1848-1942 | en | | | | Girls -- Juvenile fiction; Children's stories | 2007-06-18 |
| An Investigation into the Nature of Black Phthisis
or Ulceration Induced by Carbonaceous Accumulation in the
Lungs of Coal Miners | Makellar, Archibald | en | | | | Miners' phthisis; Lungs -- Dust diseases; Coal miners -- Diseases; Miners -- Diseases; Occupational diseases | 2007-06-23 |
| Medical Investigation in Seventeenth Century England
Papers Read at a Clark Library Seminar, October 14, 1967 | | en | | | | Boyle, Robert, 1627-1691; Embryology -- England -- History -- 17th century | 2009-09-18 |
| The Communes of Lombardy from the VI. to the X. Century
An Investigation of the Causes Which Led to the Development
Of Municipal Unity Among the Lombard Communes. | Williams, William Klapp | en | | | | | 2004-04-01 |
| The Mansion of Mystery
Being a Certain Case of Importance, Taken from the Note-book of Adam Adams, Investigator and Detective | Steele, Chester K. | en | | | | | 2005-07-04 |
| Archeological Investigations
Bureau of American Ethnology, Bulletin 76 | Fowke, Gerard, 1855-1933 | en | | | | Hawaiians; Indians of North America; Missouri -- Antiquities; United States -- Antiquities; Hawaii -- Antiquities | 2006-07-28 |
| Federal Bureau of Investigation FOIA Documents - Unidentified Flying Objects | United States. Federal Bureau of Investigation | en | These records were released under the United States Freedom of Information Act. | | | | 2008-06-05 |
| An Apology for Atheism
Addressed to Religious Investigators of Every Denomination
by One of Its Apostles | Southwell, Charles | en | | | | | 2005-08-11 |
| Martin Hewitt, Investigator | Morrison, Arthur, 1863-1945 | en | | The Lenton Croft robberies -- The loss of Sammy Crockett -- The case of Mr. Foggatt -- The case of the Dixon torpedo -- The Quinton jewel affair -- The Stanway cameo mystery -- The affair of the tortoise. | | Detective and mystery stories, English; Private investigators -- England -- Fiction | 2004-02-01 |
| The Red Triangle
Being Some Further Chronicles of Martin Hewitt, Investigator | Morrison, Arthur, 1863-1945 | en | | The affair of Samuel's diamonds -- The case of Mr. Jacob Mason -- The case of the Lever Key -- The case of the burnt barn -- The case of the Admiralty code -- The adventure of Channel Marsh. | | Private investigators -- Fiction; Detective and mystery stories, English | 2009-02-14 |
| The Science of Fingerprints
Classification and Uses | United States. Federal Bureau of Investigation | en | | | Hoover, J. Edgar (John Edgar), 1895-1972 [Contributor] | | 2006-08-10 |
| Harvard Psychological Studies, Volume 1
Containing Sixteen Experimental Investigations from the Harvard Psychological Laboratory. | Various | en | | | Münsterberg, Hugo, 1863-1916 [Editor] | | 2005-07-12 |
| Preliminary Report of the Commission Appointed by the University of Pennsylvania to Investigate Modern Spiritualism
In Accordance with the Request of the Late Henry Seybert | Seybert Commission, The | en | | | | | 2004-04-01 |
| Ashton-Kirk, Investigator | McIntyre, John T. | en | | | | | 2004-05-01 |
| The Investment of Influence
A Study of Social Sympathy and Service | Hillis, Newell Dwight, 1858-1929 | en | | | | | 2005-12-10 |