On the equilibrium distribution of population in space Martin J. Beckmann OriginalPaper Pages: 81 - 90
A statistical mechanics of interacting biological species Edward H. Kerner OriginalPaper Pages: 121 - 146
Factors in visual acuity: I. Neural inhibition and the visual perception of contours Peter H. Greene OriginalPaper Pages: 147 - 156
On the interpretation of the effect of area on the critical flicker frequency H. D. Landahl OriginalPaper Pages: 157 - 162