ProblemmsOrson Pratt, J. H. Kershner, M. L. Comstock, P. Richardson, W. E. Heal, Christine Ladd, D. J. Mc Adam, Artemas Martin, A. B. Evans and Prof. Johnson · The Analyst · 1878

Research Methodology for Economists: Philosophy and PracticeLadd, George W.; Johnson, Glenn L. · American Journal of Agricultural Economics · 1987

AFRICAN LAND-LOCKED STATES: INCONSISTENCIES AND INACCURACIES OF PROSELadd L. Johnson · 1969

Reports of APA CommitteesMerold Westphal, Bill McBride, Richard Schacht, Frank Dilley, Gary Iseminger, Tommy L. Lott, Deborah Johnson, Richard Wasserstrom, Jorge Gracia, Rex Martin, Bernard Gert, Rosalind Ladd, Kevin Galvin and Helen Longino · Proceedings and Addresses of the American Philosophical Association · 1995

Reports of APA CommitteesJohn Caputo, Baruch Brody, William L. McBride, Richard Schacht, Frank Dilley, Lucius Outlaw, Deborah G. Johnson, William Mann, Jorge J. E. Gracia, Rex Martin, Bernard Gert, Rosalind Ekman Ladd, Helen Longino and Kevin Galvin · Proceedings and Addresses of the American Philosophical Association · 1994

African Land-Locked States: Inconsistencies and Inaccuracies of ProseLadd L. Johnson and Edmund H. Dale · Annals of the Association of American Geographers · 1969

The effect of growth hormone supplementation on late nutritional independence in pediatric patients with short bowel syndromeAlan P. Ladd; Jay L. Grosfeld; Ora H. Pescovitz; Nancy B. Johnson · 2005