Search for: Title Author Subject Series that begins with: 10 20 30 50 100 per page < Previous 10 Headings Next 10 Headings > Browse Headings # Puerto Rico. University. Social Science Research Center. A Social Science Research Center study 1 Puffin books, PS200 1 Puffin chalk 2 Puffin chalk series. 1 Puffin chapters. 9 Puffin classic 2 Puffin classics 32 Puffin easy-to-read 4 Puffin easy-to-read. Level 2 7 Puffin easy-to-read. Level 3 6 10 20 30 50 100 per page < Previous 10 Headings Next 10 Headings >