What are the best online free Books in PDF can you recommend for the study and information about Basic Needs Approach (BNA)?

1. "Basic Needs Approach: A Poverty Alleviation Tool" by B. Mondal

2. "Basic Needs Approach to Development" by David Hughes
3. "Basic Needs Approach: Theory and Practice" by R.K. Mukhopadhyay
4. "Basic Needs Approach in Development Economics" by M.J. Lobo
5. "Human Needs and the Basic Needs Approach" by Charles A. Cobb Jr.