С. С. Боидаренко & Г. С. Вартаияна

Ralph M. Feather Jr., PhD, Assistant Professor Geoscience Department ... & Susan Leach Snyder, Retired Teacher, Consultant Jones Middle ... & Dinah Zike, Educational Consultant Dinah-Might Activities, Inc., ... (...)

Lithology (1)

Catherine P. Foley & Keith E. Leslie & Rex A. Binks (...)

Обсерватории. Инструменты, приборы и методы астрономических наблюдений (1)

Diana Morton-Thompson & Arnold M. Woods

Technique and technology of exploration works (1)