9 1 50 Arnold Lobel Primary Author mixed material 9780749711900 cover_days_with_frog_and_toad.jpg Arnold Lobel Primary Author mixed material 9780140315660 cover_frog_and_toad_all_year.jpg Greg's microscope Millicent E. Selsam Primary Author Arnold Lobel Illustrator mixed material 9780064441445 cover_greg_s_microscope.jpg Dinosaur Time Peggy Parish Primary Author Arnold Lobel Illustrator mixed material cover_an_i_can_read_book_dinosaur_time.jpg Arnold Lobel Primary Author mixed material 9780749711917 Arnold Lobel Primary Author mixed material 9780749712099 Arnold Lobel Primary Author mixed material 9780749712105 Arnold Lobel Primary Author mixed material 0224021532 Arnold Lobel Primary Author mixed material 9780064430463