- Biewick, Laura R.; McLellan, Marguerite W., 1990, Isopach maps, perspective projections, and correlation diagrams of the Paleocene Flowers-Goodale coal resource unit in the northern Powder River basin, Birney and Broadus 30‘ x 60‘ quadrangles, Montana-Wyoming: Coal Map 136-A, 2 maps on 1 sheet :col. ;56 x 131 cm. and 38 x 68 cm., sheet 105 x 137 cm. +1 sheet (104 x 68 cm.),
- Dillinger, Jean K., 1990, Geologic map of the Grants 30‘ x 60‘ Quadrangle, west-central New Mexico: Coal Map 118-A, 1 map :col. ;55 x 91 cm., on sheet 112 x 102 cm., folded in envelope 30 x 24 cm.,
- Hardie, John K.; Arndt, Harold H., 1990, Stratigraphic framework of coal beds in the Fort Union Formation, eastern part of the Fort Peck Indian Reservation, Daniels, Roosevelt, and Sheridan counties, Montana: Coal Map 122-C, 5 sections on 1 sheet ;sheet 86 x 104 cm., folded in envelope 30 x 23 cm.,
- Honey, James G., 1990, Stratigraphic sections showing coal correlations within the lower coal zone of the Paleocene Fort Union Formation, Riner Quadrangle, Carbon and Sweetwater counties, Wyoming: Coal Map 125, 43 sections, 1 map on 1 sheet ;19 x 15 cm., sheet 75 x 107 cm., folded in envelope 30 x 24 cm.,
- Sanchez, J. D., 1990, Stratigraphic framework, coal zone correlations, and depositional environment of the Upper Cretaceous Blackhawk Formation and Star Point Sandstone in the Scofield and Beaver Creek areas, Nephi 30‘ x 60‘ Quadrangle, Wasatch Plateau coal field, Carbon County, Utah: Coal Map 128-B, 1 map :col. ;58 x 89 cm., on sheet 87 x 110 cm., folded in envelope 30 x 24 cm. +1 sheet (103 x 147 cm.),
- Sanchez, J. D.; Ellis, Eugene G., 1990, Stratigraphic framework, coal zone correlations, and depositional environment of the Upper Cretaceous Blackhawk Formation and Star Point Sandstone in the Candland Mountain and Wattis areas, Nephi 30‘ x 60‘ Quadrangle, Wasatch Plateau coal field, Carbon and Emery counties, Utah: Coal Map 128-A, 1 map :col. ;58 x 89 cm., on sheet 107 x 137 cm., folded in envelope 30 x 24 cm.,
- Zeller, H. D., 1990, Geologic map and coal stratigraphy of the Needle Eye Point Quadrangle, Kane County, Utah: Coal Map 129, 1 map :col. ;58 x 46 cm., on sheet 71 x 112 cm., folded in envelope 30 x 24 cm.,
- Zeller, H. D., 1990, Geologic map and coal stratigraphy of the east of the Navajo Quadrangle, Kane County, Utah: Coal Map 130, 1 map :col. ;58 x 46 cm., on sheet 79 x 140 cm., folded in envelope 30 x 24 cm.,
- Zeller, H. D., 1990, Geologic map and coal stratigraphy of the Petes Cove Quadrangle, Kane County, Utah: Coal Map 132, 1 map :col. ;58 x 46 cm., on sheet 81 x 81 cm., folded in envelope 30 x 24 cm.,
- Zeller, H. D.; Vaninetti, Gerald E., 1990, Geologic map and coal stratigraphy of the Ship Mountain Point Quadrangle and the north part of the Tibbet Bench Quadrangle, Kane County, Utah: Coal Map 131, 1 map :col. ;71 x 46 cm., on sheet 137 x 84 cm., folded in envelope 30 x 24 cm.,
