1. Korotayev, Julia Zinkina, and Justislav Bogevolnov, Kondratieff waves in global invention activity (1900–2008);Andrey;Technol. Forecast. Soc. Chang.,2011
2. Tables for the Calculation of Tides by Means of Harmonic Constants;Anon,1926
3. The clustering of chemical element discovery was first pointed out by Cesare Marchetti, Stable Rules in Social and Economic Behavior;Anon;Boll. degli Ingegneri,1988
4. Anon Historical Statistics of the United States, Colonial Times to 1970, vols. 1 and 2, Bureau of the Census, Washington DC; (see also Statistical Abstract of the United States, U.S. Department of Commerce, Bureau of the Census, Washington, DC).