Respected Sir, I am in need of the following two papers. If you can help me find it, it would be of very great help. #1 Lack, D 1947. The significance of clutch size, I-II. Ibis, 89, 302-352. #2 Skutch, A.F 1949. Do tropical birds rear as many young as they can nourish? Ibis, 91, 430-435. Thank You Sir. -- R. Yuvaraj, Int. PhD in Biological Sciences, C/O Dr. Renee M Borges, Centre for Ecological Sciences, Indian Institute of Science, Bangalore, India. 560012 Phone +91-080-22933103