“Patching Up” Evaluation Designs: The Case For Process Evaluation
John Clayfon Thomas
http://onlinelibrary.wiley.com/doi/10.1111/j.1541-0072.1980.tb00903.x/abstract
“Patching Up” Evaluation Designs: The Case For Process Evaluation
John Clayfon Thomas
http://onlinelibrary.wiley.com/doi/10.1111/j.1541-0072.1980.tb00903.x/abstract