His credits include "Merrily We Roll Along," "Rose O'Day," “Silver Bird” (with Dee Libbey), "Those Lazy-Hazy-Crazy Days of Summer," "Comes Love," and "Don't Sit Under the Apple Tree (with Anyone Else but Me).

"[1] With frequent collaborators Al Sherman and Howard Johnson he wrote, "Dew-Dew-Dewey Day".

[1] In the 1930s, Tobias and several of his fellow hit makers formed a revue called "Songwriters on Parade," performing across the Eastern seaboard on the Loew's and Keith circuits.

He co-wrote the 1933 to 1936 Merrie Melodies theme song "I Think You're Ducky" with Gerald Marks and Sidney Clare.

And, he later co-wrote the 1936-1964 Merrie Melodies theme song "Merrily We Roll Along" with Murray Mencher and Eddie Cantor.