Ripped up linoleum...asbestos?

I ripped up some linoleum flooring in a house that was built in 1980..and installed by 1985... It doesn't come up easy. There is a greyinsh backing like construction paper on the back of the linoleum, amd a white paper like stuck to the floor. Would this contain asbestos? I wore a resporator halfway through the project, using a big metal putty knife on a pole. The linoleum peels up but leaves a white paperish material on the conc. Floor.