My professor is asking me to search through scientific literature to find melting point ranges of different compounds. I can only find exact melting points through my findings. Is there any website that has literature giving me these ranges that are usually within a 1 degrees C range?

My professor is asking me to search through scientific literature to find melting point ranges of different compounds. I can only find exact melting points through my findings. Is there any website that has literature giving me these ranges that are usually within a 1 degrees C range?