C. Holdren

Long range dispersal in checkerspot butterflies: Transplant experiments with Euphydryas gillettii

P. Ehrlich, C. Holdren, 1981, Oecologia.

Managing lakes and reservoirs

W. W. Jones, J. Taggart, C Holdren, 2001 .

The ecology and population genetics of an alpine checkerspot butterfly, Euphydryas anicia

R. R. White, P. Ehrlich, M. J. Cullenward, 2004, Oecologia.

Toxics A to Z: A Guide to Everyday Pollution Hazards

C. Holdren, J. Harte, R. Schneider, 1991 .

Delayed population explosion of an introduced butterfly.

P. Ehrlich, J. Fay, C. Boggs, 2006, The Journal of animal ecology.

Ecological determinants of food plant choice in the checkerspot butterfly Euphydryas editha in Colorado

P. Ehrlich, C. Holdren, Cheryl E. Holdren, 2004, Oecologia.

Toxics A to Z

C. Holdren, J. Harte, R. Schneider, 1991 .